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adjective. To be very good at one's job, displaying competence, high quality standards, and attention to detail; this is the urban equivalent to "professional". This is sometimes used to denote "more professional". Written variations include "mo'fessional".
That boy is hella mofessional, he even got fancy name cards and shit.

You'd think he was mo'fessonal and all by the clean white rag that he shows off, but then you give him the 'ok' and homeboy goes and pulls out his dirty-ass rag from his back pocket for your windshield.
by biggie sf December 08, 2009
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Jun 13 Word of the Day
No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.
User: I need to talk to you, NBS.
User2: ESAD, Noob.
by Heko July 17, 2004
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