The crowd gave the referee a Bronx cheer after the bad call.
Bronx cheer
idiomSynonym 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”).
Origin
disputed originBelieved to originate from the making of the sound during sporting and other events in the Bronx, a borough of New York City, New York, USA.
When the politician made his empty promise, someone in the back row let out a loud Bronx cheer.
The audience expressed their collective disdain for the lackluster performance by greeting the lead actor with a resounding Bronx cheer as he exited the stage.