muffed up means fucked up. use "muff" to replace fuck. very fun to use so you dont get in trouble by the parentals or offend the old folks. use different variations of muff too-muffer, muffing, etc.
That's muffed up dude!
Go muff yourself.
by Kyle Ernesti June 17, 2006
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A muffed punt is when you accidently slide your penis into a womans anus while having doggy style vaginal intercourse.
"Dude, my girl is so mad at me. While we were having sex, I muffed the punt, and she thought it was intentional!"
by soccerfag September 28, 2009
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giving your friend a sneak attack with your index and middle finger up his bum hole
luke likes when it is finger muffing time

Jake: ah shit he just fingermuffed my asshole

Luke: Oh ya i did smell my fingers
by perry for president October 21, 2009
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To go deep underground exploring caves and potholes. An adrenaline fuelled activity conducted by "Muffers"

Muffer
Those muffers have been Muffing, that's exploring caves. They like to go in deep.
by Muffers-Rule September 3, 2015
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the sexual act in which two females place there vulvas over your ears to create a ear muffing sensation

"jenavieve and Denise were over at the crib last night, somehow i found myself tied up to a radiator with with one hand in a ash tray and one hand on last nights chili. both with their pussy lips strapped on my ears. like a pair of beats by dre"
ear muffing "jenavieve and Denise were over at the crib last night, somehow i found myself tied up to a radiator with with one hand in a ash tray and one hand on last nights chili. both with their pussy lips strapped on my ears. like a pair of beats by dre"
by brian mayer July 2, 2015
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when two close female friends, ie. lesbians, find themselves in the throes of passion and proceed to make sweet girl-girl love
hey man, did i tell what i saw at that party last night?
nuh.
i walked into this bedrrom and saw these chicks muffing off.
by Tripp Dusty January 4, 2010
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synonym for fucked up.

slang term that is often used on Call of Duty Modern Warfare 2
Alex: Dude what did Sam do?

Tyler: He cried after getting high

Alex: Thats muffed up
by Alex Hildenbrand May 6, 2010
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