look up any word, like trill:
 
1.
A relatively short girl with a massive head.
Damn! Do you see that J-Head walking across the street? Her head is the size of a watermelon.
by Ngo March 08, 2013
 
2.
a junkie who is usually a street person and/or homeless; a bum who is addicted to drugs.
all of those j heads were all out in the street last night asking people for money
by Susan Clark June 04, 2006