short for saying most definitely, or sure.
Yo you gonna be at the party tonight?" Jarel: "Mos def bro.
sexy genius....need i say more
'mmmmmmm mos def sexy mexy texy bruva'
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a bastardization of most definately
usually used in online lingo
A: hey
B: wuzup
A: n2mh u
A: ssdd
A: wanna see a movie
B: mos def
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(N.) When you reach the maximum of not being able to hear.
"Yo, I don't think that D-Bo heard me. He must be Mos Def now."
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tyler: Did it feel the best when i put it in your butt last night?
zane: mos def!
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Mos Def comes from two words, mos is short slang for "most" and def is short for "deft" which means skilled. Thus "mos def" is defined as "most skilled."
Mos Def is also a rap alias for one Dante Smith.
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