This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A loud exclamation intended to scare someone, especially a child. Usually used when one has been hidden from the victim and then suddenly appeared unexpectedly.

n. Informal Any sound or word: You never said boo to me about overtime.

interjection. Used to express contempt, scorn, or disapproval or to frighten or surprise another.

verb-intransitive. To utter a boo.

v. To express contempt, scorn, or disapproval of by booing: booed the singer off the stage.

n. Slang Marijuana.

interjection. A loud exclamation intended to scare someone, especially a child. Usually used when one has been hidden from the victim and then suddenly appeared unexpectedly.

interjection. A word used ironically in a situation where one might have scared someone, but said someone was not scared. Not said as loudly as in definition 1.

interjection. An exclamation used by a member or many members of an audience, as at a stage play or sports game, to indicate derision or disapproval of what has just occurred.

n. A derisive shout made to indicate disapproval.

n. A close acquaintance or significant other, derived from French beau.

v. To shout extended boos derisively.

v. To derisively shout extended boos at.

v. to show displeasure (after a performance or speech) by making a prolonged sound of “boo”.

Same as bo.

n. Same as bu.

n. a cry or noise made to express displeasure or contempt

v. show displeasure, as after a performance or speech

"MsgBox oldboo = \% oldboo\% while boo is now \% boo\% boo = 1000"

booed    booing    boos   

call    yell    vociferation    shout    cry    outcry    condemn   

Baku    Blue    Cebu    Chengdu    Chou    Chu    Crewe    Drew    Ewe    Few   

catcall    battle-cries    slagging    harrumph    yes    contemn    woot    ironware    huzza    hallelujahs