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13.
A failed attempt at cunnilingus as evidenced by your girlfriends' stoic and silent body language/expressions
Yo bro it was pretty quiet in there last night, what were you doing giving her a muffler?
by Ridiculon May 30, 2009
 
1.
The. Muffler is the act of stuffing a girls panties into her anus, while she is asleep, leaving any air that escapes her anus, muffled.
" That drunk slut passed out after a hard ass pounding, so I couldn't resist giving her a nice muffler, her tiny little g-string fit right in her gaping hole"
by BBawesome August 20, 2011
 
2.
A very hairy pussy
Yo dude, you see the size of that muffler on that broad??
by Keegs February 11, 2004
 
3.
The process of preventing your female partners orgasmic groans from becoming too loud by applying another females genitalia to her mouth, hence muffling the moans.
- "Darling we've had noise complaints from the neighbours about your orgasmic moanings, how about we ask your twin sister if she'd like to do a spot of muffling?"

- "Dude, my missus is so loud when we get it on that I have to apply a muffler, which is pretty much a win win for me!!"
by Stu-muffler November 12, 2009
 
4.
A cushy office seat designed to muffle your farts
Nobody can hear me farting in my cubical because I have a pretty good muffler.
by skidmarx88 April 14, 2011
 
5.
A device attached to the muzzle of a firearm to muffle the sound of firing.
My hood, illustrious; marvelous rap, screw-on mufflers. -Raekwon
by Megabruh June 05, 2010
 
6.
Something that shouldn't be loud.
Ricer: Oh yeah I just got a loud muffler for my car so people will think my car is cool because it has a loud exhaust but I'm too poor to afford a real powerful car!

Me: ......You're an idiot.
by Kevin Esser February 25, 2008
 
7.
A man used as a cover for a lesbian. Think of it as a buffer for her carpet munching tendencies
Your dad is a real muffler, eh?
by irascio December 14, 2007