Fart-knocker update

I've found the term to fart knocker from urbandictionary.com
here it is

1. fart-knocker

A dumb ass

My boss is a fartknocker.

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1. fart knocker

Originally slang for male homosexual, but the phrase has been used so widely (mainly by second-graders)that it now can mean almost anything.

1. I think Semaj must be a fart-knocker. 2. Hey, fart-knocker, your cheating!

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I just love the second grader part. BTW, I put the Semaj in that term.