The TikTok Boo Trend That Crosses Eyes and Pranks Partners

The TikTok Boo Trend asks almost nothing of its stars: say "boo," cross your eyes, lean toward the camera, and make a goofy face. That is the entire format, and it has carried the TikTok Boo Trend from a single September clip to millions of views across recreations and prank videos through the first half of October, according to Know Your Meme's trend report published this week.

One September clip started it

The earliest version Know Your Meme could trace went up on September 20, when TikTok creator @v99191 posted a clip saying "boo" while crossing their eyes with a goofy expression, tagged with hashtags like #boooo and #funny. The post gathered more than eight million views and passed a million likes within a few weeks, the report noted, and imitators began recreating the expression within days of it landing.

What makes the clip work is how little there is to copy. There is nothing to learn, sync, or edit. Viewers watch the original, try the face themselves, and post the result. That low barrier turned a single goofy moment into a template, and the template did the rest of the work as the calendar rolled toward Halloween.

The prank version took over in October

As the TikTok Boo Trend spread in late September and into October, creators split into two camps, Know Your Meme reported: some recreated the look to poke fun at the original clip, and others turned it into a prank on people who never saw it coming. The prank version works by promising a friend, boyfriend, or family member that both people will do the face together, then cutting the filmer's half and posting only the other person's solo performance.

The view counts on the prank videos kept climbing through October, according to Know Your Meme's roundup of examples. On October 2, creator @jayciebelcher3 had her boyfriend do the face and posted only his attempt, a clip that passed a million views and gathered more than two hundred thousand likes in about eleven days. A day later, @93930.r tried the same move on her boyfriend and cleared one point seven million views with more than three hundred thousand likes in roughly ten days. On October 6, @kkk4t33's version of the prank pulled more than two and a half million views and over six hundred thousand likes in about a week. On October 9, @nimrashamid turned the trick on her dad for a video that earned more than seven hundred thousand views and close to one hundred fifty thousand likes in four days. By October 12, @lily_d.88's attempt with her cousin had crossed a million views and three hundred thousand likes in a single day.

The TikTok Boo Trend also splintered into edits and niche references as it grew, the report added, including K-pop star face edits, a Michael Jackson riff on the "boo" theme, and sibling and celebrity attempts. Halloween season is giving the format a second wind: the spooky timing means the goofy face now doubles as a no-cost costume for creators who skipped the makeup aisle, and the trick-or-treat framing writes its own caption.

Why the simplest formats like the TikTok Boo Trend keep winning

TikTok's recent history is full of formats that ask viewers to do very little, and those usually travel the farthest. The split-face trend that settled family resemblance debates earlier this month worked from a single comparison image, and the two fishes audio trend asked creators to defend one relatable take over a Love Island clip. Both needed almost no production, and both spread on the strength of the idea alone.

The TikTok Boo Trend follows the same recipe with even less setup. There is no sound to learn and no steps to memorize; the prank structure supplies its own punchline when the victim's solo face hits the feed. October has rewarded that simplicity before, with Halloween-adjacent formats routinely outperforming polished content in the weeks before the holiday. The only real risk, judging by the boyfriend and dad videos, is agreeing to film "together" with someone who has already seen the trend.