MOS

An individual from the Quad Cities area pretending to be a marine.

Look at Ron the MOS, he's not a real marine

by Jeffbowman October 13, 2025

mos def

a fly MC, often apperaring alongside Talib Kweli, The Roots, or Common

mos def is one ill nigga, son

by Ponyboy August 3, 2003

mos def

Slang for 'most definitely'

"Wan' a cig, man? "Mos' def!"

by David Allison August 21, 2003

mos def

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.

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.

by Ben Kenobi; crazy old wizard. October 22, 2009

mos def

(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."

by kduballstar October 6, 2005

mos def

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."

by Gillian January 4, 2005