look up any word, like donkey punch:
 
1.
A half ounce of Cannabis
Whats good cuz, I just re upped on a half zip today
by BenKkKkK August 21, 2008
 
2.
When one wears the fly on their pants half zipped. It was an extremely popular style in many high schools between 2004 - 2007. It must be noted that only the most stylistic and iconic figures in the high school social scene can successfully rock the half zip.
Person 1 "Hey bro, your fly is undone."

Person 2 "Nah, man I am rocking the half zip; I am bringing it back."

Person 1 "Man, I wish I was as stylistic and iconic as you."
by The Dart 07 February 07, 2010