Boo!

A spontaneous expression often used to startle, frighten, or surprise someone. It is frequently associated with Halloween or spooky occasions but can also be used playfully in various social contexts. The term serves both as an interjection and a means of engaging in playful teasing, usually accompanied by a facial expression or gesture that enhances its effectiveness in conveying surprise or mock fright.

Boo! meaning with examples

• As the haunted house tour guide dimmed the lights, he jumped out from behind a curtain and shouted, 'Boo!' causing many guests to squeal in surprise and delight. The atmosphere was perfect for thrilling frights, and such playful scares became a highlight of the event for visitors looking for a Halloween thrill.
• During the Halloween party, Jenna dressed as a ghost and burst into the room, waving her arms and exclaiming, 'Boo!' Her friends erupted in laughter, catching them off guard despite knowing she was coming. This light-hearted moment brought everyone together, reminding them of the fun spirit of the season.
• In an attempt to make her puppy bark for the first time, Lily went up to him quickly and shouted, 'Boo!' The puppy jumped back, startled, then quickly returned with a happy yelp. It was a cute moment that highlighted the playful bond between them, showcasing how 'Boo!' can create laughter and unexpected reactions.
• While waiting for the movie to start, Jamie pretended to be scared and suddenly yelled 'Boo!' at her friends, causing one of them to spill popcorn all over the floor. The unexpected scare added humor to the wait, making the group laugh, as they playfully plotted revenge for the surprise.
• As part of a trick-or-treat routine, Tom and his friends would pop out from behind trees and shout 'Boo!' at unsuspecting neighbors, causing a mixture of shock and laughter. This playful tradition not only entertained them but also forged friendly connections with those in their community during Halloween.