Top definition
When you cant contain yourself and instantly masterbate where ever you are.
Dude, yesterday I was on the bus and there was this really hot girl and I just had this urge, so I instabeted rigtht there on the bus! Instabate!
by missachan400 May 26, 2010
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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