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.
by faldok March 28, 2012
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