Murfle 

Verb, singular. onomatopoeia. The sound made by someone speaking in a muffled or blurred manner.

John said "murfle murfle murfle Haven." I'm not sure what he meant.

Example 2:
John said "murfle murfle murfle the kids." I think we're going to Wal-Mart.

Murfle by Atayodea Mi August 16, 2010

MOBERTUCKY MUFFLER 

When you're going down on your girlfriend put your lips inside her pussy and blow as hard as you can until you hear the sounds of a Mobertucky Muffler.

I left the Wabash with that girl from South Park and gave her a Mobertucky Muffler behind a dumpster.

MOBERTUCKY MUFFLER by Groeber field March 5, 2019

Mufflepants 

Underwear designed to effectively manage problematic farting.

Before discovering Mufflepants, the loudness and stench of my work-related flatulence was a terrible problem during staff meetings!

Mufflepants by Dr Bunnygirl September 30, 2019

muffler fucker 

Someone who drives too close to the car in front of him/her--a tailgater.

"(aloud in car when looking in rearview mirror) Hey, get off my ass, muffler fucker!"

muffler fucker by AJinPhilly August 25, 2005

Mufflebate 

The act of sticking your penis in a still warm muffler

Me and my friend were looking for a runaway dog when we saw a guy park his truck so my friend decided to Mufflebate

Mufflebate by Sir.Fartsalot September 20, 2012

Canine Mufflehouse 

A specially constructed, hi-tech doghouse invented to effectively prevent neighbors from having their sleep destroyed by your obnoxious little outdoor yapper.

I picked up the Canine Mufflehouse right before my neighbors, who had apparently joined forces to have me taken deep into the desert with Fifi, made their move!

Canine Mufflehouse by Dr Bunnygirl September 25, 2019

rusty muffler 

Feces left around the anus. The situation one finds oneself in when, having defecated, one finds that there is no toilet paper available.

I had a crap this morning, but there wasn't any bumwad, so I had to go all day with a rusty muffler.

rusty muffler by king dude January 24, 2005