1. The process by which a guy named Colin (like in the movie Love Actually) goes somewhere new and tries to have sex with as many women as possible. Also known as Colinization.

2. To spread an STD.

WARNING: Side effects of colinization include ball-scratching, the motto "Whether in war or love, never pull out," and occasionally a Chimpanzee mating ritual of shaking a tree branch and pointing to the genitals.
Person A: Why's Colin over at the ADPi house?

Person B: He's trying to Colinize.

Person A: Ohhhh, so that's why he's shaking that tree branch at your girlfriend....
by Joe_Biden_my_Time December 31, 2012

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