Gotta piss like a racehorse

Meaning

A very common, slightly crude way to say that you really, really need to use the bathroom. It emphasizes that the situation is urgent.

Crude, emphatic

Used in a sentence

• Can we stop at the next gas station? I gotta piss like a racehorse.
• He sprinted into the house shouting that he had to piss like a racehorse.
• I drank way too much coffee, and now I gotta piss like a racehorse.