Pee in (someone's) Cheerios American slang verb phrase rude
To provoke someone to anger or make someone upset, irritated or disappointed
Don't be mad at me, Fred. I didn't mean to pee in your Cheerios.
You should not have peed in Mr. Carlos's Cheerios. He is a big stockholder in our company.
You need to calm down, who peed in your cheerios?
A very offensive term used to describe an upper-class British man who is stupid or inexperienced
If you trail your coat, you invite or incite a quarrel or an argument by acting in a provocative way.
Someone who is foolish and annoying; an idiot
To say that you're ready to fight for something.
To say something obscene, vulgar or offensive
The verb "pee" ("piss") should be conjugated acccording to its tense in the sentence.