Meaning of the word "bronx cheer" in English

What does "bronx cheer" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

bronx cheer

US /ˌbrɑːŋks ˈtʃɪr/
UK /ˌbrɒŋks ˈtʃɪər/

Noun

a sound made by blowing air out between the tongue and lips, used to express derision or contempt; a raspberry

Example:
The comedian was met with a loud Bronx cheer after his terrible joke.
The audience gave the unpopular politician a collective Bronx cheer.