Def

IS short for definitive. Originated in NY, no doubt.

or

"#3 on your touch tone, D-E-F spells def" either Tak or Ryu of Styles of Beyond...

by Titanium October 6, 2004

def

def- short for definatly

is it pos for someone to be def ser about something that is def not pos to be ser about

by kingss49 January 30, 2003

def

Short form of "definitely", as it flows a lot better and can be said much quicker.

Ray: Would you tap that?
Geoff: Def not!

by stokes December 28, 2005

Def

The hip/gangsta way of saying Death.

According to the Ali G Show,
Ali: "Yo, lets talk about this thing called def man. You know, D-e-f"
Doctor: *my God this man is a complete moron*

by Well Thats my Mama May 13, 2005

def

Extremely good or talented, from the word "death".

That's a def tag up you got there.

by TFS August 18, 2005

DEF

DEF means that something is really good or to someones standards.

DEF also means not being able to hear anything

DEF does NOT mean definitly

That concert last night was so DEF

Yo Im DEF from that concert last night

by yosoypopichulodelanoche June 11, 2009

def

Def is when you're too lazy or your IQ is too low and you don't know how to properly write the word "Definitely".

So instead of looking uncultured and write shit like "Defenitely" or "Definetly" etc. you Def that shit and save yourself from embracements.

I'm def a retard
I'm def gonna beat my meat after writing this definition.

by Yung Iboprofen June 10, 2017