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1 definition by xtina yea i kick ass

 
1.
A back on a male that is sexy becase it is the opposite of nerdy-square. An example of a peson with a sexy rounded-square back is Mike Shinoda.
"Hey I don't like that kid over there watching the bball players. His back isn't rounded-square.
de xtina yea i kick ass 09 Septembrie 2006