Def so
Abreviated slang for 'Definately So': Used mostly by really amazing people i.e. Barack Obama
S: Hey Carrie, don't you just LOVE this shirt on me?
C: Def Not!
S: No Carrie. DEF SO.
C: Def Not!
S: No Carrie. DEF SO.
so so def
So so def is another way to say most definatly.
1: Are you going to the game?
2: So so def.
2: So so def.