pisser's block
When one fails to summon the powers to urinate and ends up standing there feeling stupid. Usually brought on when in public urinals with a lot of people around.
Mike - Oh sweet you're back, man you took your time in there.
James - I had to look convincing, I didn't end up pissing at all.
Mike - What? What happened?
James - I had pisser's block.
James - I had to look convincing, I didn't end up pissing at all.
Mike - What? What happened?
James - I had pisser's block.