Top Definition
1. A kid who is closeted and enjoys wanking the banana whenever he's home alone.
2. A nerd who is characterized by participating in the nerdiest clubs at school.
3. A man who likes to overpay girls for their services
Neil: "Hey, what are you doing tonight?"
Ryan: "Oh, nothing parents are going to be out tonight so I just thought maybe I could do something...alone."
Neil: "Dude, you are going to jack off, aren't you! You are such a supum."
by 8059475 March 19, 2009
4 Words related to Supum

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