in a boo

in a bad mood, feeling gloomy or sad or angry

Kelly: *humph* *sigh*
Alyssa: "Are you in a boo?"
Kelly: "Yes.. grrr"

by missliss512 October 14, 2012

Boo

AAAAHH!

Boo! AHH!

by SHEEEH June 9, 2021

Boo

The scariest thing ever

"BOO!"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"

by SLAP 'NOTHER CLAM ON THERE April 28, 2022

Boo boo

Pretty much the same as terrible, or something nasty/ inappropriate. Mostly used as an adjective.

"I thought this game was gonna have some boo boo graphics but it's actually pretty good!"

"I don't want no boo boo sh*t in my mailbox."

by whoviantho February 12, 2017

Boo boo whistle

Noun

A fart; may be used in reference with flatulence.

Grandma took communion on bended knee, proceeded to stand up and blew her boo boo whistle. The congregation gasped.

by Awsnapsonitson September 12, 2019

boo

people use this word to there friends (if they have any)
or to there boyfriend/girlfriend or you can use this word to scare someone

i call my bestest friend boo cuz we are so close i also call other people boo such as shane dawson

hey "boo" how's it going

by theobomb April 20, 2018

Boo Basket

a trend on TikTok where people (usually young women) purchase an assortment of cozy items and put them in a basket, these baskets are typically themed around a season or aesthetic, namely fall, hence the name "boo basket", but not all of them are fall-related. This trend seems to capitalize on the "overconsumption-core" trend on TikTok, where creators will buy excessive amount of items, usually beauty or bath products, and make an aesthetically pleasing video displaying the often alarmingly sized collections of said items, neatly arranged and color-coded. Essentially, it's just another iteration of people buying cutesy items they don't really need for clicks.

"my sister got me a boo basket for Halloween and I don't know how to tell her that I already own most of the things she got for me"

by queenofcringe October 12, 2025