When you wake up with wood and have to lean against the wall behild the toilet so you don't piss all over the bathroom.
Woke up with wood and it caught a bit of backsplash before I realized I had to get my boner lean on.
The name of the awkward action when your erection presses up against the front of your trousers, forcing you to lean forward.
Jane: Hey, are you looking at my tits?
John: N-no, I just...er...
Jake: Aw no man, you got some serious boner lean right there.
*John Straightens up*
John: ...anyone have a tissue?