boo

A derisive shout made to indicate disapproval.

To shout extended boos derisively.

"When he took the podium, the crowd booed."

To shout extended boos at, as a form of derision.

"The protesters loudly booed the visiting senator."

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.

Used ironically in a situation where one had the opportunity to scare someone by speaking suddenly.

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.