To fart when being fucked in the ass.
I was watchin a porno once and it was called belgian boomer and the girl farts and the guy didnt know what to do so he said "ohhh a little bit of back talk"...lol yeah uh i didnt know how to describe it any better than i have already done so in the definition so i thought i would share a little story of how i came upon the word.
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