n.
Function: noun
Inflected Form: plural boos
Date: 1801
1 : a shout of disapproval or contempt
2 : any utterance at all ― usually used in negative constructions <never said boo >
BOO
Meaning of BOO in English
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012