When, after one accidentally makes a noise which sounds like a fart (such as shifting positions on a leather couch), they desperately attempt to repeat the noise they made, except more noisily to make sure that everyone hears it, in order to prove that they weren't actually farting. Can cause even more embarrassment if not executed correctly.
Everybody around Mike: *laughter*
Mike, frantic: "It was my shoe I swear!" *diligently drags foot across floor trying to repeat sound*
Chad: Dude, quit desperepeating. You're just making yourself look more stupid.