Person who receives multiple degrees and keeps taking courses instead of holding a profession related to the degrees earned. Can be a compliment or an insult depending on the speaker.
Ex. 1: a compliment
"Man, I think you're so cool for writing a dissertation on Mesoamerican maize fertilization. You're a real professional student!"

Ex.2 an insult:
"Hey Jack, won't you get a real job and quit being a professional student?"
by ignor September 29, 2004
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One who is studying for a professional graduate degree; particularly a law, medical, dentistry, veterinary, or business student.
Man, what are all these undergrads' cars doing in the garage? As a professional student, I should get priority.
by Rhythmgen January 20, 2010
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A professional student is a person that has reached a level(USUALLY REACHED IN 9TH GRADE) where they can bullshit everything they do in school and still get A's
Did you do the math homework?
Fuck that i am a professional student
Whats your math average
90
by Louis January 13, 2006
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Any person who has been in college for more than 5 + years of college experience; The student with the most debt; Students who have attended a 2 year college but took 4-5 years to finish it or transferred or never graduate;Usually also known as under achievers;Students who has more friends than Tom in myspace; Excessive partier even in his/her late 30's; Student who has a 5 year old kid when they finally graduate; Just finishing his/her 4 year degree nearing upon his/her high school reunion.
Robert: What is going on Fred? What have you been up to since after we graduated in '96?

Fred: I've been in college. I finally finished my 4 year degree this year.

Robert: Really?

Fred: Yeah I've been a professional college student
by Chappelle is my nigga July 18, 2006
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