the residual shit stains in your underwear at the end of the day. Just like skid marks, but more apt to be from a possible shart.
by turriblechuck February 19, 2012

by PapaPedro January 9, 2021

When you have anal sex and the women farts during. When the guy pulls out a little poop comes with it and it's very stinky.
by Stinky Muffler October 9, 2016

by ripperMag00s September 30, 2018

In order to give someone a Monroe Muffler, one must have a sufficiently large potato and one or more willing or unwilling anuses in which to insert aforementioned potato into.
Dayuuuummm! I was just up at R.I.T. partying and this one bitch was just begging for me to give her a Monroe Muffler!
by Explorer1958 June 17, 2013

by Nibbaslover June 15, 2018
