by oh.my. February 5, 2010

A device worn beneath outer garmets to arrest the foul stench coming from ones butt when farting and to reduce the sound from reverberating round
Farts smell and sound much worse when in the shower than sat in the car with a guff muffler (clothes) on
by The Guffers August 14, 2011

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 Dick davis March 7, 2014

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 longboards September 19, 2009

by PapaPedro January 9, 2021
