BOO
👻👎📣

Example

She jumped when I whispered "Boo!" from behind the door.

Definition

An exclamation used to startle or frighten someone

  • Often when popping out from hiding

An exclamation by an audience to show disapproval or derision

A derisive shout indicating disapproval

  • Often heard at performances or sports

To shout boos in derision

  • To express disapproval by yelling "boo"