Verb.

To penetrate someone with a penis, typically your own.
I'm going to call up that hooker, on craigslist, and penistrate her for $150 an hour.
by Margeret Shadowski April 23, 2006
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It's the action to ram your penis unexpectedly in other people's faces.
This fetish is practised by many bagamists created by satan's mother.
The last penistration I did was an attack on my sister's face. She was in such a shock that she immediately began to cry.
by 1+2=3 April 30, 2006
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