A specific type of peek created by yekoro (aka der YEK) which involves strafing around a corner and killing your opponent in first personshooters like CSGO
Person 1:*clicks on opponent's head*
Person 1: Oh boy, i just yekoropeek'd the fuck outta this guy, XANTARES ain't got shit on me!
Yakoo! Maker and creator of the devil. Swine merchant, your time is near at hand. Fuck with me and your time will be now. Your presence here affects the mind of my people like a fever. You Yakoo are the bearer of Nine thousand Nine hundred and Ninety Nine diseases, evil, corrupt pork chop eating atrocities...