look up any word, like muddin:
 
1.
inadequete, failure, lack
These symptoms are shown by deficiencies in her genes, which don;t produce enough protein.
by Alexandra February 12, 2005
 
2.
Having a problem, lacking something, acting like an idiot cause there is something wrong with you. In place of saying "what's your problem".
Jason is doing something stupid or saying something dumb for no apparent reason:

"Hey Jason, what's your deficiency???"
by Tbotmoore July 27, 2005