Definition: Anything that fits the description of deff-fuck
E. G
"I was in a library one night, and as I was searching for my keys which I left somewhere between the books, then I saw this girl and she was the deff-fuckest girl I've ever seen"
" What a deff-fuckable guy he is"
" Imma commence repentance before I get deff-fucked by this epidemic that's diffusing recently"
by momo252598 February 22, 2020
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Ultimate Definite
"U wanna go 2 Mike's party?"
"OMG, Ults Deffs!!"
by JamieSmillie September 11, 2015
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A state of paranoia brought on by excessive alcohol or substances use.
That last pint made him totally 'deff out'.
by Grizlord October 3, 2006
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to leave your friends to hang out with your boyfriend of girlfriend.
As soon as she started going out with Tony she completely deffed out and left Amanda.
by maggie February 26, 2004
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to have your deffinitions rejected by urban dictionary, then get pissed off.
omg why does urban dictionary have to deff reject me?
by brick tamblan June 6, 2006
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to be cool
opposite of crap
deff= deffinitly twapp
twapp= cool
wow thats so deff twapp
your sweaters deff twapp
by Avery Wheaton September 8, 2007
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another way of saying most deff, fo sho, or of course. it originated from clint but was then spread to south florida by nikki
Meghan:"Paul's ass is huge"
Nikki: "Totes Deff!"
by NikkiHuts May 21, 2008
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