What is Petus?
1.
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."
See
2.
Alternative to penis... also can be an insult
AHH! She bit my petus.
Bob, quit being such a petus
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When at a house party, Hiding the Duke is when you take a crap in the home owner's drawer, closet, or somewhere they won't loo..