boo
🇺🇸
/buː/
🇬🇧
/buː/
A sound made to express disapproval or disappointment.
The audience booed loudly when the unpopular politician took the stage.
A shout of 'Boo!' to surprise or scare someone.
He jumped out from behind the door and shouted 'Boo!', causing her to scream.
To express disapproval by shouting 'Boo!'
The crowd booed the unpopular singer as he walked off stage.