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a fly MC, often apperaring alongside Talib Kweli, The Roots, or Common
mos def is one ill nigga, son
mos def by Ponyboy August 3, 2003
Related Words
mostest mos' moss moshers mosquito mosh mosh pit Mostestest Mosterest moster
Slang for 'most definitely'
"Wan' a cig, man? "Mos' def!"
mos def by David Allison August 21, 2003
A man who can not only act with 5 star ability, but can also create some of the best shit out on recording ever.
Mos Def yet an actor of decent fame still keeps his hip-hop true.
mos def by Paul October 2, 2003

Mos Eisley

Mos Eisley Spaceport, Tatooine. You will never find a more wretched hive of scum and villainy.
When visiting Mos Eisley, one must be cautious.
(adv.) meaning: most definitely; the phrase also pays homage to the infamous emcee, Mos Def.
"You better hit me up with those tracks."
"I'll mos def hit you back, hommie."
mos def by kduballstar October 6, 2005
1.: A slang term for "most definitely."
2.: A rapper.
3.: Deaf - this useage is the least common, mostly by people who didn't understand it in the first place or mispronounced.
1.: "Am I going to the party? Mos def!"
2.: "Mos Def is one of the best rappers of our time."
3.: "After that concert, they're mos def."
mos def by Gillian January 4, 2005