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Petus is a term for a full-grown male who has a penis so small it could be the penis of a fetus.
"That guy showed me his penis in the bathroom. It was so small I'm sure it was a petus."
by New Year's In Tampa April 18, 2009
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Soft and offensive. Just like you.

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Acronym - People for the ethical treatment of the undead.
Hey, did you guys hear about that group protesting in front of gamestop? Yeah, it's PETU. I guess there's some new zombie shooting game released.
by v4p3d November 19, 2012
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It does not matter how you do it. It's a Fecal Mustache.

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Alternative to penis... also can be an insult
AHH! She bit my petus.

Bob, quit being such a petus
by RedClaw September 09, 2004
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The vengeful act of crapping on a lover's chest while they sleep.

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