From Wikipedia.com "Blowing a Raspberry"

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!"

http://www.answers.com/topic/bronx-cheer