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When you're penetrating someone anally and they fart, creating a muffler sound.
Brian "Did you go give it the chick you met at the bar last night"
Tony "Yeah, I gave it to her from behind. She even gave me a Boston Muffler. The vibration was amazing"
Vag, pussy, vagina (a penis warmer/holder)
That babe’s got a bone muffler that just won’t quit
Being able to inhale a large quanity of smoke (pipe, blunt, joint,or a bong) then swallows the smoke without chocking or coughing on the smoke
Person 1:Hit this shit bruh.
Person 2: (Inhales alot of weed)(Swallows and doesnt choke)
Person 1: Damn bro you have muffler lungs!!!
When you take humongous hits out of a bong, pipe, blunt, or joint and swallow it without choking or coughing !
Sam : *Takes a bong rip , milks it then swallows it*
Isaiah: Damn bro you got muffler lungs !!
a overly loud car, by use of the muffler being deleted usually only driven through urbanized areas and never raced.
man, im getting really sick of all these losers with their boomer muffler. im trying to sleep.
When you take a shit that's either huge, or after eating spicy foods, causing your anus to bleed.
That spicy burrito gave me such a hot muffler.
A person or object that makes sure the cuck remains quiet.
Teddy used a Cuck Muffler to silence his moans while watching his wife Tammy fuck his best friend Greg.