def

Short for definately, but often used sarcastically.

(Person A looking at a hot chick)

Person A: I think I have a chance with that babe.

Person B: Def dude.

by Matt0912 May 11, 2009

def

def- short for defence in gamers community.

They will atack now !!! so all back and lets def ffs !

by exployt July 14, 2005

def

short for "definitely"

Ah you're def close to me then. If you're tech savvy, I might just need your help to give me a hand in hooking up my comp at my soon-to-be home.

by wiCkEd eEv January 27, 2003

def

Permutation of "deft". Adroit.

Yo, sir. Those moves are def.

by Bud April 03, 2004

Def

UrbanDictionary.com's abbreviation for 'definition'. See the 'new def' link at the top of the page.

I added a new def today.

Okay, okay, I DO sound stupid.

by Diggity Monkeez February 04, 2005

def

Certain. First used by Run-DMC. Sort for definate.

Were the best most def.

by Ahmose July 31, 2003

def

abreviation for the word definately, usually used by kids who are either way cool, or way lame.

the only way to pull of using the term "def" is to be the first one around to use it. if you're just copying someone, people might think you're lame.

Kara asked if the new guy was cute.
Emily repiled, "Oh most def! He's soo hot!"

by Kara April 25, 2005