To shit, throwup, ejaculate, and/or piss in, on , or near anything or anyone.
To make something that was very clean and pristine, totally disgustingly messy and gross.
When I come home drunk and horny, I usually STEP on the floor, the dog, the bed, my wife and one of the cats before I fall asleep.
Matt: Is that an above ground pool in the ground?
Andrew: Why yes it is.
Matt: That's pretty redneck. It looks like someone STEP'd in it.
Andrew: Its just the oak tree fuzzies.
Matt: You should pour that 5 gallons of pool chlorine in it.
Andrew: OK, but when it clears up, you better not STEP in it.
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