piss like a racehorse

• piss like a horse, piss like a Russian racehorse

An emphatic form of the earlier expression piss like a horse, after the great volume of urine produced by horses every 4 hours or so.

piss like a racehorse (third-person singular simple present pisses like a racehorse, present participle pissing like a racehorse, simple past and past participle pissed like a racehorse)

1. (vulgar, idiomatic) To urinate profusely, especially in reference to a profound need to do so.

   Pull over as soon as you can. I need to piss like a racehorse!

• See Thesaurus:urinate

• work like a horse, eat like a horse
• stale (to urinate, used of horses and cattle)

• David Sessions, "Does a Racehorse Pee Like a Racehorse?" Slate, 8 June 2007.
• "The Origin of the Expression 'Piss Like a Racehorse'", Today I Found Out, 21 July 2015.