pee in someone's Cheerios

English

Verb

pee in someone's Cheerios (third-person singular simple present pees in someone's Cheerios, present participle peeing in someone's Cheerios, simple past and past participle peed in someone's Cheerios)

Alternative form of piss in someone's Cheerios.
- 2014 September, Jenna McCarthy, Carolyn Evans, “Maggie Malone Makes a Splash”, in Maggie Malone Gets the Royal Treatment, Naperville, Ill.: Sourcebooks Jabberwocky, →ISBN, page 189:
  “Whatever, I just don’t know how to make Elizabeth believe me. Brianna said that if I don’t convince Elizabeth to quit the team, she’s going to make us pay. Elizabeth is brand-new but totally outswam Brianna during tryouts. She’s super jealous!” I explain, resting my chin in my hands. / “I hear you,” Frank says, setting his knitting needles aside. “That little whippersnapper’s a piece of work. Who peed in her Cheerios anyway?”
- 2015 November, Ali Brandon, chapter 3, in Plot Boiler (Black Cat Bookshop Mysteries; 5), New York, N.Y.: Berkley Prime Crime, →ISBN, page 30:
  “Count on Georgie for that,” Doug replied. “Always gotta pee in everyone’s Cheerios. Heck, you should have seen him when I first opened the doughnut shop and he found out we served hot coffee. He accused me of poaching his business.”
- 2019, Amanda Anderson, “Two Superheroes and No Sidekick: Overcoming Competition, Comparison, and Codependency”, in All My Friends Have Issues: Building Remarkable Relationships with Imperfect People (Like Me), Nashville, Tenn.: Nelson Books, →ISBN, part 2 (Encouragement), page 101:
  As my friend Terry sometimes warns, the wise learn not to call certain people with good news because they will just pee in our Cheerios.