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a guy who is incredibly intelligent, but also kind of a dick
Manders found the cure for cancer, but then he called my mom a slut. He's such a penius.
penius by Rosseus July 27, 2008
A penis which is more intelligent than it's owner.
1. "I was about to hook up with this fifteen year old girl, but my penius wouldn't get hard."
2. Man #1 - "Dude, I had major whiskey dick last night"
Man #2 - "Naw bro, your penius saved your ass - that chick was a straight troll."

Man #1 - "Thanks penius!"
penius by Spiral Dancer December 21, 2014
Steve Jobs, from what Ive heard, sounds like a total penius.
penius by blozzy September 14, 2013
Someone with excessive knowledge of the male genitalia.
My girlfriend is a penius.

Most males become peniuses during puberty.
penius by NAYL January 26, 2005
a person who's main course of study is the penis, and constantly flaunts his penis knowledge to others.
Dennis Rodman: I know more about penis than anyone in this room. I bet you couldn't even locate the seminal vesical.

preist: That may be true Mr. Rodman, but there is no reason to act like a penius during Sunday mass.
penius by privatemike September 19, 2009
orig. from Ralph and some hollowhead.

Someone with excessive knowledge of the male genitalia.
My girlfriend in a penius.

Most males become peniuses during puberty.
penius by NAYL January 25, 2005