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A combination (or portmanteau) of the words "moist", "ass", and "barf" all in one. It pretty much means poop or diarrhea, but with a funnier sounding word.
Person 1) "I totally just marfed on your birthday cake!"

Person 2) "That's okay. Maybe we can eat your marf and vomit all over each other!"

Person 1) "Only if you fist me!"

Person 2) "Deal!"
by Green Bean Boy December 02, 2010
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31
To vomit, as in when one has had too many shots of cheap tequila or equivalent substance.
Dude, did you see _____ last night? After $2 rail night at the Virginian, she marfed all over herself!
by The Pebble December 04, 2003
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32
Mouth Fart, A burp that smells bad or rotten.
Your mom Marfed and it smelled like lunch meat and rotten socks!
by DJ KRUNCH! October 11, 2007
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33
A meaningless nickname for a quiet/shy person who is intellectual and doesn't talk much.
Sally: Hey, who's that quiet girl in science?
John: Oh, we just call her Marf.
Sally: Marf?
John: Yeah it's a nickname for a shy brainiac.
by Anonymously smooth April 26, 2010
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34
verb - to throw up in your mouth a little bit
Jack: Check it out! I mixed milk and applesauce!
Jill: Ugh... I just marfed...

Some of the definitions in the Urban Dictionary make me marf.
by Alsharad October 27, 2017
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35
Basically it's Otha's version of "scarfing" down some food, the only way he can.
Man duuuuuuuuuude.... I got really high and totally marfed down a gallon of ice cream, two pizzas, a pound of M&M's and a bucket of chicken wings in one sitting!
by soggynachosdirtyunderwear February 16, 2011
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