The act of defecating into one's Air Duct or AC System, causing a foul shit-like smell within the entire facility.
My Boss fired me and I got back at his Bitch Ass by giving the office a "Grumpy Muffler", that'll teach them!!
by Ass-lickin-lova December 12, 2023

Putting a washcloth in betweens ones ass cheeks while in shower to deaden the sound and smell of an oncoming fart while your soon to be sexual partner is in close proximty or in same bathromm as s
aid person .
aid person .
Jerry was in shower after a night of eating white castles aa he waa washing up getting ready for some hot sex he gave himself a motor city muffler so jessica couldnt hear or smell his horrible gas from those little tasty sliders.
by Detroit dikhead August 19, 2025

a overly loud car, by use of the muffler being deleted usually only driven through urbanized areas and never raced.
by n o i October 7, 2021

Someone who likes to sniff the shit off of someone’s penis after they did it with a guy that had shit on his butthole
Guy1 - Wassup bro what did you do last night?
Guy2- Nothing Much.. just had a threesome last night and one of the guys was a weenie muffler.
Guy2- Nothing Much.. just had a threesome last night and one of the guys was a weenie muffler.
by TheUrbanKing444 May 1, 2025

by Nopyyy February 2, 2024

When a vehicle lacks a muffler, or is otherwise intrinsically obnoxious or obnoxious by virtue of its owner, and vigilantes or society at large decide to tie the carcass of a dead opossum to the vehicle to display distaste for the vehicle or its driver.
"F--- that guy, if he declines his engine in front of the house again, he's getting an (o)possum muffler."
"We gave the Purple Avenger a 'Possum Muffler."
"We gave the Purple Avenger a 'Possum Muffler."
by (O)victim June 22, 2025

by Bodacioustatas69 January 21, 2022
