The highest possible degree to which one can be Def. The is no higher level possible to which one can be def, therefore mos def is the epitamy of defness. There is only one known person to have achieved a true mos def status, that person, formerly known as Date Terrel Smith, then adopted the name of Mos Def upon pushing through the plateau. This level of deafness is the epitamy of hip hop culture.
At one point in my life, i believed that i could possibly be mos def, unfortunately after further review i realized that i was just a trick ass mark.
by Pappa Horace November 30, 2007

by aysha n gabby January 05, 2005

by 92Prodigy April 26, 2011

by queen jobo May 02, 2005

by cait/eileen January 30, 2003

by G-Union October 21, 2003

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."
by RTK666 December 28, 2004
