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.

by EJL Supreme May 7, 2006

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

by stchbro May 28, 2015

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".

by Big L 11968 June 2, 2011

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!

by freaknasty1 June 19, 2010