fo def 

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."

fo def by shwingshwang January 14, 2008

fo def 

another way of saying definitely.

Brian: you commin over tomorrow?
Pete: oh, fo def.

fo def by Pete Larson July 30, 2006

fo def. 

originaly a typo on aim a combonation between for sure and definatly or def. now it is a word that is ten times better than both of those words

man that movie was of the hook
yeah fo def.

fo def. by Kyizzzzie May 1, 2006

fo def. 

Kinda like for real but 90 times cooler

She is hot! Fo def.!

fo def. by Rez December 11, 2004

Def Totes Fo' Sho' 

1. Literally means "definitely, totally, for sure".

2. A completely redundant yet catchy phrase used to enthusiastically say "yes" without using too many extra syllables.

3. A phrase used when you strongly agree with something.

Alex: Hey Robyn, are you going to the concert this weekend? I heard it's gonna be bomb!
Robyn: I am so there! How about you, are you going?
Alex: Yeah, I wouldn't miss it! Jeff and Evan, are you guys going?
Jeff and Evan: Def Totes Fo' Sho'!

Def Totes Fo' Sho' by BandCamp2009 October 2, 2009

fo defs 

A contraction between the word definitely and the phrase "for sure". Used as assurance, reassurance, confirmation, acceptance, affirmation, encouragement, agreement, and many more.

Jim: let's order a pizza and watch Terminator 2 tonight.
Joey: fo defs.

fo defs by jimjimjimjimjimjimjim December 26, 2010

Fo Deff 

Fo Deff
adverb
Full Meaning: For Deffinetly.
A verbal contract meaning that you must do this action.
Also, less strictly used as to agree with what is being said.

Girl One: "Can You Come Over This Weekend?"

Girl Two: "Fo Deff!"

Fo Deff by Sarah.M.Kennedy January 27, 2009