1 definition by LxBxC

Top Definition
to violently sneak.

To go or move in a quiet, stealthy way while having some sort of a violent, destructive motive.
That fucking oven door gretched up on my hand!

Hey man, stop gretching up on me!

So, I was playing paintball and had a sweet sniping spot. Then out of no where Chris gretched up on me.
by LxBxC June 15, 2007
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