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piss like a racehorse

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piss like a racehorse

rude slang To excrete an excessive amount of urine; to urinate for a long time. This is why I don't drink lots of beer: only a couple of pints and I'm already pissing like a racehorse. Can we pull over soon? I need to piss like a racehorse!

See also: like, piss, racehorse