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 9, 2009
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