Boo Trend is a viral social media trend that became popular on TikTok in late September 2026. It involves saying “boo” while crossing your eyes, making a funny face, and often moving closer to the camera. What looks like a simple facial expression has turned into a popular joke, with people copying the original video, making edits, and pranking their friends and family.
The trend has also spread to Instagram Reels, where creators share their own versions. Some videos feature couples or family members, while others use K-pop stars and other famous personalities as part of the joke.
What Is the Boo Trend?
The Boo Trend is a short video format built around an unusual facial expression. Participants say “boo” while crossing their eyes and making an exaggerated face, sometimes leaning toward the camera to make the moment even funnier.
The humor comes from how silly and unexpected the expression looks. Unlike dance challenges that require practice or complicated movements, this trend is easy to copy. A person can recreate it with a phone camera and a few seconds of recording.
Another popular version involves getting a boyfriend, girlfriend, parent, sibling, or friend to join in. The person recording may then remove their own part of the video, leaving the other participant looking awkward on screen. This turns the trend into a lighthearted prank that viewers can relate to.
Boo Trend Origin: Where Did It Start?
The earliest known example of the Boo Trend appeared on TikTok on September 20, 2026. The video was posted by user @v99191 with the caption “Booooo,” along with hashtags including #boooo, #relatable, and #funny.
The video gained more than 8.4 million views and approximately 1.1 million likes within three weeks, helping the unusual expression reach a much larger audience.
Other users soon began copying the face and the way the creator said “boo.” As more people recreated the video, the trend developed into different versions, including prank videos and edits featuring popular celebrities.
Although this is the earliest example identified in the available documentation, it does not necessarily prove that no similar video existed before it. The original creator’s role is best understood as the earliest known starting point of the trend.
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How Did the Boo Trend Become Viral?
The Boo Trend spread quickly because it is simple, easy to recreate, and works well in short videos. People do not need special equipment or editing skills to participate. They can record the expression, share it with friends, or turn it into a prank.
By late September 2026, the trend had begun appearing outside TikTok, including on Instagram Reels. Creators also started using familiar faces and pop culture references to give their videos a different twist.
Prank videos helped the trend reach more viewers in early October. On October 3, a TikTok user posted a version involving a boyfriend that received more than 1.7 million views and 308,000 likes in roughly ten days. Other creators later used the same idea with their parents and cousins.
These examples show how one simple action can take on a life of its own when people adapt it to their own relationships, humor, and interests.
| Detail | Information |
|---|---|
| Name | Boo Trend |
| Type | Viral video trend and prank |
| Origin platform | TikTok |
| Earliest known example | September 20, 2026 |
| Main action | Saying “boo,” crossing the eyes, and making a funny face |
| Popular platforms | TikTok and Instagram Reels |
| Common format | Funny facial expressions, copied videos, and pranks involving friends or family |
| Popularity | Spread rapidly across social media in late September and October 2026 |
Why Is the Boo Trend So Popular?
One reason for the trend’s popularity is its simplicity. Many viral challenges require a specific song, dance, costume, or editing technique. The Boo Trend needs very little preparation, making it easy for almost anyone to try.
The facial expression is also memorable. Crossing the eyes while saying “boo” creates an awkward, exaggerated look that stands out in a feed full of ordinary videos.
Pranks add another layer of humor. Viewers often enjoy seeing how a friend or family member reacts when they realize they are the main subject of a funny video. The format also works well with celebrity edits, allowing fans to include their favorite singers and performers.
How Is the Boo Trend Used in Memes?
The trend is not limited to people recording themselves. It has also become a format for jokes and edits.
- Couple pranks: One partner convinces the other to copy the expression, then posts a version that focuses on the other person’s face.
- Family videos: Parents, siblings, and cousins are encouraged to join in, often creating funny or awkward moments.
- K-pop edits: Fans use images or clips of K-pop idols to recreate the expression or imagine how a favorite performer would look doing it.
- Reaction videos: Creators use the face and the word “boo” as a quick way to make a joke or react to a situation.
- Remakes: Users copy the original style while changing the caption, people involved, or setting.
These variations help keep the trend fresh. Even though the main action remains almost the same, each creator can change the situation to make the video feel personal.
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Is the Boo Trend a Prank or a Challenge?
It can be both. When someone records themselves making the face and invites others to copy it, the video works as a challenge. When the creator tricks another person into participating and then posts only that person’s embarrassing moment, it becomes a prank.
Most versions rely on harmless embarrassment rather than a complicated setup. Still, it is worth remembering that people may not want their awkward moments shared publicly. Asking permission before posting someone else’s video is a simple way to keep the joke friendly.
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What Makes the Boo Trend Different From Other Viral Trends?
The Boo Trend does not depend on a particular song or a difficult dance routine. Its main feature is a facial expression, which makes it easy to adapt across different platforms.
It also combines two familiar forms of internet humor: copying a recognizable action and surprising someone with a prank. This combination allows the trend to work as both a personal joke and a repeatable video format.
Its rapid spread also shows how social media users can turn a short, ordinary clip into a much larger trend. Once people recognize the expression, they can understand the joke without needing a long explanation.
Boo Trend is a viral social media trend in which people say “boo” while crossing their eyes and making a funny facial expression. It is popular for short videos, recreations, and pranks.
The Boo Trend became popular on TikTok. According to Know Your Meme, the earliest known example was posted by TikTok user @v99191 on September 20, 2026.
To recreate the trend, say boo, cross your eyes, and make an exaggerated facial expression while recording a short video. Some creators also involve friends or family members.
The trend is easy to copy, requires little editing, and creates funny or awkward moments. Its simple format makes it suitable for pranks, reaction videos, and celebrity edits.