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1.
An acronym used for the phrase "Cup, Grip, Spread, Insert" This term is used when laying claim to some hot little lady who is looking for some lovin'. Once it has been said, the speaker then has the immediate rights to intercourse with the intended target.

Developed by JP, MG, MC in TGIF
"Hey dude, see that chick. CGSI!"
by HumperNDumper02 September 08, 2009