We don't have synonyms for bronx cheers yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bronx cheer.
(n) :
(US, idiomatic) Synonym of raspberry (“a sound intended to resemble flatulence made by blowing air out of the mouth while the tongue is protruding from and pressed against the lips, used humorously or to express disdain or scorn”).
(n) :
(US, idiomatic) Synonym of raspberry (“a sound intended to resemble flatulence made by blowing air out of the mouth while the tongue is protruding from and pressed against the lips, used humorously or to express disdain or scorn”).