The act of a man picking an open urinal that accomplishes 2 things.

1. He is not standing right next to another man
2. Anybody else that enters the bathroom will be forced to stand next to another man.
I was late because Frank urinal checkmate'd me, so I had to wait to go to the bathroom.
by urinalcheckmatelolo April 6, 2011
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Where you try to use the urinals in a public toilet but cannot do so because there are not spaces where you wont directly next to another person, despite there being several free urinals.
sounds like a case of Urinal Checkmate
by NOOTNOOT June 29, 2011
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