Blowing a raspberry or making a Bronx cheer is to make a noise made to signify derision, made by sticking out the tongue between the lips and blowing to make a sound reminiscent of flatulence.

Nomenclature: In the US, Bronx cheer is sometimes used, otherwise, in the US and in other English speaking countries, it is known as a raspberry or razz - an instance of Cockney rhyming slang, where the non-rhyming part of a rhyming phrase is used as a synonym. In this case, "raspberry tart" rhymes with fart.

One of the most famous uses of the Bronx Cheer is in the song "Der Fuehrer's Face", as recorded by musical comedian Spike Jones in 1942, which shows disdain for Adolf Hitler with the repeated refrain "We'll Heil! <Bronx cheer sound> Heil! <Bronx cheer> Right in Der Fuehrer's Face!"

In the USA, some whoopee cushions have "a Bronx Cheer" written on them.