Often heard in the order "badda bing, badda
boom", the phrase is a way of saying, "That's it, it's all taken care of". The exact origin of "badda
boom, badda bing" is a mystery, but the best guess I've heard is that it started as a verbal imitation of a "rim shot," the
drummer's punctuation to a comic's punchline in the old vaudeville routines.
"We
set the Judge up with a hooker,
Louie busts in with a camera, and badda bing, badda
boom, case dismissed".