What is Fo Def?
1.
another way of saying
Brian: you commin over tomorrow?
Pete: oh, fo def.
See
2.
Like "Mos Def" or "Fo Sho".
A combination of the "for" from fo sho and the "definitely" from mos def, as in "Most Definitely."
"Tried that new demo yet?"
"Fo def; it was awesome."
See