deffas

Definitely. Used in an offhand way to appear casual and cool, when really everyone know's the person is a twit.

"Yeah, I'll be getting drunk tonight, deffas!!!"

by K cizzle May 15, 2005

deffa

Shortened form of "definitely". Used mainly in informal communication

I'm going to watch Michael Clayton, deffa

by R. Thirucumaran January 11, 2009