Top Definition
Mystery Cock of the Week

A bonding ritual undertaken by fraternities in which a photograph of each member's penis is anonymously sent across a fraternity email list each week. The other frat brothers must then try to guess to whom the penis belongs.
Dude, is it gay that Delta Chi is starting a MCOW?

No, man. Its just brotherly love.
by whaaat617 September 27, 2010
1 more definition
A response to pain dished out McDonald's style.
Ronald McDonald McSmashed Grimace in the McFace.
Grimace cried out "McOw!"
by Bushwak April 15, 2007

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