The crusty residue left on the penis after ejaculation (penis - semen - cement). Typically this partially/completely covers the peehole causing urine to shoot off to the side upon the first attempt.

Pronunciation: pen-uh-si-ment (sounds like the first part of "penicillin" and all of "cement")
Dude, how was your date with Bambi last night, and, where is the shower curtain?

Oh man, it was great! We did it four times and I must have passed out. Then, first thing this morning I go to take a piss, and, I'm standing right in front of the toilet and I hit the shower curtain big time. So, I took it down and threw it in the wash.

HAHAHA Penisement strikes again!
by subbie_333 September 18, 2011
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A relative measure of how much of a dick a person is.
Depending on your preferred news source, Mitt Romney may have higher or lower penisity as compared to Barrack Obama.
by homebrew dave May 27, 2012
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1. From the verb 'to penis'.

2. Any act involving use of the penis.

3. Fondling or kissing of the penis.
Student to test proctor: Why does that kid have his dick out?
Test proctor: Let the quadriplegic finish penising his essay questions.

The gay guys were short on time and couldn't do much more than kissing and penising.
by serbear4u February 15, 2009
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A Peniser is a chronic and dedicated Masturbator. Most Penisers penis their penis for hours at a time and are very proud of being Masturbators.
Steve: I know Tony is a Peniser.
Rick: How do you know?
Steve: I saw him penising himself all day on Chaturbate yesterday.
Rick: Wow, I would have never guessed, he seems like such a nice guy

Mark: I always knew that guy was a Wanker!
by Antonio El Pajero March 15, 2019
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To be a penis, or to be difficult and hard to work with...
Jim: The sky is blue
Bob: why??
Jim: because the atmosphere makes it that way
Bob: Why
Jim: ... Stop being penisive you penis
by octocat April 19, 2012
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The overcompensation for having a smaller dick by being an even bigger one.
"I think that rude prick with the obnoxiously oversized truck suffers from penisitis."
by tah-dard! September 26, 2011
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