The act of having sexual relations with your car or car parts such as a muffler
Dude: Have you seen bob latly?
Dude2: No but he told me he was goin' to muffle-fuck his girlfriends car.
by Mr.Trips ( jacob barile) November 28, 2007
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(Verb)
The act of stifling your sex noises so your children in the adjoining room can't hear how mommy likes to be spanked and called a whore
The kids have been home all thanksgiving break. I'm tired of having to muffle-fuck every night so they don't hear us.
by Kbee405 November 26, 2017
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