piss in someone's cornflakes

present singular third person pisses in someone's cornflakes · participle present pissing in someone's cornflakes · participle past pissed in someone's cornflakes · past pissed in someone's cornflakes · alternative pee in someone's cornflakes · alternative pee on someone's cornflakes · alternative piss on someone's cornflakes

1. humorousidiomaticinformaloftenvulgarTo disappoint or irritate someone.

   Sorry to piss in your cornflakes, but my mom's got asthma, so take your cigarettes outside.

   1 more example

   Okay, now I don't want to pee on your cornflakes or nothing, but how exactly are we going to get up there?

   2018 November 17, “Food Hunt”, in Angry Birds on the Run, season 1, episode 2, spoken by Bomb (Baker Terry)

   Synonyms: burst someone's bubble, piss in someone's cereal, piss in someone's Cheerios, piss on someone's chips, piss on someone's bonfire, piss on someone's campfire, put a damper on, rain on someone's parade