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1.
Someone who goes day in and day out without really having any goals or plans for the future. A professional nobody's day may consist of waking up, chilling with friends, eating something, smoking a joint and occasionally attending a minimum wage part-time job. They are usually nice people that tend to not be too serious or opinionated on any political, social, or religious standards. Some of them are in bands too, for they'd rather live off of doing a hobby than pursuing a long time career.
Dude 1: Hey bro you know if Donny's going to college anytime soon?

Dude 2: Probably never man, he's a professional nobody.

Dude 1: Alright, that's chill.
by Captain Fermzy January 28, 2011