Boo Trend (TikTok Cross-Eyed Boo Prank)
Cross your eyes, say boo, lean in. Then find out you did it alone.
Rising. Best time to post.
The Boo trend is a TikTok format where someone crosses their eyes, says "boo" and leans toward the camera, copying a clip first posted on September 20, 2026. Know Your Meme dates the earliest example to TikTok user @v99191, whose video passed 8.4 million views within about three weeks. The version that spread furthest is a prank: a creator talks a boyfriend, parent or cousin into doing it "together", then cuts their own part so only the other person is seen.
What does Boo Trend (TikTok Cross-Eyed Boo Prank) mean?
The Boo trend is a tiny bit of physical comedy. The person on camera crosses their eyes, pulls a goofy face, says "boo" and moves toward the lens, the way the first clip did. On its own it is just a silly face, and many early posts copied it to tease the original video.
What made the Boo trend a meme is the prank built on top of it. One person suggests that two of them do the trend together, films the other person's attempt, then edits out their own half before posting. The finished clip shows a boyfriend, a dad or a cousin committing fully to a cross-eyed "boo" with no idea that their partner never did it. The joke is the trust: the viewer sees someone being a good sport, and the caption reveals they were set up.
Why did Boo Trend (TikTok Cross-Eyed Boo Prank) take off?
The Boo trend spread because it costs nothing to make and works on anyone. There is no sound to find and no costume or editing skill needed beyond trimming a clip. The prank adds a small story to a two-second face, and the person being pranked is usually someone the creator loves, so it reads as affectionate rather than mean.
The numbers came fast, according to Know Your Meme's entry of October 13, 2026. A partner prank posted on October 6 passed 2.6 million views and 641,300 likes in about a week, and a boyfriend version from October 3 reached 1.7 million views in about ten days. A cousin version posted on October 12 passed 1.3 million views in roughly a day. Each new relative (dads, siblings, cousins) gave people a fresh reason to post their own Boo trend clip.
Where did Boo Trend (TikTok Cross-Eyed Boo Prank) come from?
Know Your Meme traces the Boo trend to a TikTok posted on September 20, 2026 by user @v99191, captioned "Booooo" with tags including #boooo and #relatable. It showed the cross-eyed "boo" face and passed 8.4 million views and 1.1 million likes within about three weeks. Know Your Meme calls it the earliest example it documented, which is not proof that nobody made the face before.
In late September other users recreated the expression, often to poke fun at the original. A September 28 fan edit used images of Sunoo from the K-pop group ENHYPEN making a similar face, and by September 30 the format had reached Instagram Reels. In early October the prank version took over: boyfriend pranks on October 2 and 3, a partner prank on October 6, a dad prank on October 9 and a cousin prank on October 12. Know Your Meme added its entry on October 13, and a Know Your Meme explainer republished on Yahoo followed on October 14.
- @v99191 posts the earliest known Boo trend clip on TikTok; it passes 8.4 million views within about three weeks.
- A K-pop fan edit pairs the face with images of ENHYPEN's Sunoo.
- The format shows up on Instagram Reels.
- A boyfriend prank reaches 1.7 million views in about ten days.
- A partner prank passes 2.6 million views and 641,300 likes in about a week.
- A cousin prank passes 1.3 million views in roughly a day.
- Know Your Meme adds an entry for the Boo trend.
- Yahoo Entertainment republishes Know Your Meme's explainer of the trend and prank.
Popular versions of Boo Trend (TikTok Cross-Eyed Boo Prank)
The solo face
The original: one person crosses their eyes, says "boo" and leans into the camera.
Boyfriend prank
A creator asks her boyfriend to do the trend with her, then posts only his attempt.
Parent and family pranks
The same setup with a dad, a sibling or a cousin, often captioned with who fell for it.
K-pop edits
Fans cut in clips or photos of idols, such as ENHYPEN's Sunoo, pulling a similar face.
Accuracy reenactments
Later posts restage the original clip as closely as they can, or swap in a niche reference.
How to post Boo Trend (TikTok Cross-Eyed Boo Prank) on TikTok
- Film yourself crossing your eyes, saying "boo" and leaning toward the camera.
- For the prank, ask someone to do the Boo trend with you, record their turn, then trim your own part out.
- Post it on TikTok or Reels with a caption saying who you got, and only prank people who will laugh about it.
Questions about Boo Trend (TikTok Cross-Eyed Boo Prank)
What is the Boo trend on TikTok?
The Boo trend is a TikTok format where someone crosses their eyes, says "boo" and leans toward the camera. Its most popular form is a prank in which only one of two people is shown doing it.
Who started the Boo trend?
Know Your Meme dates the earliest example to a September 20, 2026 TikTok by user @v99191, captioned "Booooo". It is the first one documented, not proof of who invented the face.
How does the Boo trend prank work?
You tell someone you will both do the trend, film their attempt, then cut out your own part before posting, so it looks as if they did it alone.
Why do people cross their eyes in the Boo trend?
The crossed eyes copy the face in the first clip. A cross-eyed "boo" looks silly on purpose, which makes the person who commits to it the punchline.
Is there a song for the Boo trend?
No single sound defines it. The sources describe the spoken "boo" itself; some posts add slow music or zoom cuts.
How many views did the first Boo trend video get?
Know Your Meme's October 13 entry says the September 20 original had passed 8.4 million views and 1.1 million likes within about three weeks.
Is the Boo trend mean?
Most posts read as affectionate, since the person pranked is usually a partner or relative being a good sport. It is still kind to show them the clip and ask before posting.
Sources
What changed on this page
Updated Oct 19, 2026
- Page added with dated sources.
- Added our own illustration of the format (no original picture can be shown: the people in the clips are private).
No account or email needed. We check every report within two days; a fix shows up in the list above with the date and what changed.
