Pee-ralysis
The state of paralysis that men feel when other men are waiting for them to finish peeing at a public urinal. Leads to an inability to produce urine flow. Often solved by shaking one's unit and pretending that one has finished, only to walk to another bathroom (or stall) to do it there.
Dude, I was at the bathroom at the Stones concert and there were 15 guys watching me pee, waiting to use the urinal. The pee-ralysis set in and I couldn't get anything out!