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2.
An erection caused by the pressure of a full bladder as opposed to sexual excitement.
A pantsless Tom enters the bathroom.

Brad the homo: Woah there tiger at least buy me dinner first! *growls in a a gay manner*

Tom: Relax dumbass it's just a peerection.

Brad the homo: (dejected) Then why are you pantsless?

Tom: I forgot the put them back on after I got done boning your sister.

Brad the homo: Oh.....you know I stole her last boyfriend. *winks in a gay manner*

Tom: (gaybashes and urinates on Brad).
by Pimperator July 04, 2005
 
1.
when you have to pee really bad but you have a boner, so you have to do that weird squat/lean forward thing.
"man, i woke up this morning and had the worst peerection."
by walter_ego February 19, 2010
 
3.
when yer cock wakes up an hour before you do, because it has to piss.
"I never seen you up this early, bro. What's the deal?"
"woke up with a pee-rection."
by SPIZE!! March 15, 2005
 
4.
When a man has an intense need to pee, but cannot do so, and and erection occurs. Usually a painful experience, can also be done intentionally to prevent make it easier to "hold it in".
Liam- "Holy crap do I have a peerection right now. This is painful."
Kevin- " Maybe next time don't drink three gatorades, a Big Gulp and a massive coffee before we get on a bus for three hours. Dumb ass."
by Trick Michaels May 30, 2014