to urinate during masturbation; a person who urinates during masturbation.
If you pisswank, it could be messy; He is a fucking pisswank.
The need to urinate occurring during masturbation. Continuing to ejaculation often results in a less pleasurable orgasm. This often happens upon waking up with morning wood.
John woke up with a hard-on but he also needed a piss. He struggled on and after his ejaculation wondered why he had bothered with his pisswank after all.