dirty muffler
When after engaging a girl in anal sex, she proceeds to spray diarrhea all over you. It is actually a mix of semen and feces which has an odor similar to very old muffler grease.
I was butt-fucking Pamela after she ate 3 steak soft tacos. Right when I thought things were cool, she blew her dirty muffler all over my cheast. I'll never eat mexican food before sex again.
Dirty Muffler
When you run your car to warm the tailpipe and then fuck it
Wife didnt put out so i had a dirty muffler
Dirty Muffler
When a hot chick sits on your face and farts; drowns out moans and/or screams.
I was 69'ing with Kim when she sat up and gave me a "Dirty Muffler".
Dirty Muffler
The act of farting while you have chicken grease (mixture of butthole sweat and leftover poop) between your thighs.
Guy 1: Whats that smell?
Guy 2: haha that was my dirty muffler!
Guy 2: haha that was my dirty muffler!