piss in (one's) food(redirected from piss in his food)
piss in (one's) food
rude slang To upset, irritate, or disappoint one, especially to an extreme or excessive degree. Sorry to piss in your food, but you won't get any credits for the class unless you attend every single lecture. A: "Watch out, the boss is in a foul mood today." B: "Wow, I wonder who pissed in his food?"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.