Third-person singular simple present indicative form of piss like a racehorse

(informal, vulgar) To wet oneself; to urinate in one's own clothes while they are being worn. / (informal, vulgar, idiomatic) To laugh uncontrollably.

(slang, vulgar) To disappoint or discourage someone by ruining or criticising their plans or aspirations.

(idiomatic, vulgar, informal) To disappoint or irritate someone.

Alternative form of piss in someone's cornflakes

(UK, slang, vulgar) To frighten thoroughly; to terrify.

(slang, vulgar) To possess no money or resources.

(offensive, vulgar) Used to insult an Islamic prophet.

(slang, in hypothetical constructs) To anger someone with a disposition resistant to anger.

(idiomatic, vulgar) To rain on someone's parade.