Definitions by IBPole

gyco 

Stands for 'Get your cunt out'. Generally used when something has gone well, or telling a female to show her genitalia.

Can also be GYFCO, meaning 'Get your fucking cunt out'. This is simply to reinforce the original meaning.

Sean: Adam, I just ate bacon and its amazing

Adam: GYCO!

James: Oi Helena, GYFCO

gyco by IBPole July 6, 2011