1 definition by achuki

The act of pissing at a urinal without setting off the automatic flush going on once the urination has been completed. This can be accomplished via long range pissing, leaning way back, being invisible, or simply standing to the side of the sensor.
Dude, I thought I pulled off the perfect ghost piss, but much to my dismay, the flush went off just as I walked out of the bathroom.

I reduce my water consumption partly through ghost pissing.
by achuki March 7, 2016
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