Definition of "boo"
- 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.
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.
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.
- noun
A derisive shout made to indicate disapproval.
A close acquaintance or significant other, derived from French beau.
- verb
To shout extended boos derisively.
To derisively shout extended boos at.
- Sources