the act of peeking into the room where your buddy is having sex, usually as a form of cockblock

guy1- hey i saw jd going upstairs with laurel.
guy2- peekskies?
guy1- peekskies.
*walk upstairs*

Guys open the door and turn on the light.
guy1- *PEEKSKIES*
jd- you fucking cockblocks.
by datskat April 18, 2007
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When you see Marty Mcfly, a nip slip, and a peen all at the same time
Man when I was watching Back to the Future with my girlfriend we were two thirds of the way to a peekski
by Marty McPeekski June 20, 2015
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