Top Definition
Short of half a virgin. For one to be a halfa, they would to have only experienced oral sex.
dude, ben and i are total halfas.
by halffster(: August 09, 2009
.5 . Half of a gram of a weed.
Dealer: What you you need?
Delinquent: I don't get paid till next week and Taneisha been trippin. Can you front me a halfa?
by bitchassniggaseverywhere November 25, 2014
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