Definitions by Chris Nix

Deff 

Deff- originating in georgia, meaning Designated Extremely Fat Friend. Used primarily when u and your buddies see a hot chick with a fat friend.

guy one "damn you see that girl"
guy two" which one"
guy one "the one thats behind the Deff"
guy two"ok got ya yah shes straight"

Deff by Chris Nix October 16, 2008