Street voices
"Who pissed in your Cheerios? Something you say to someone to comment on the fact that they seem really angry or grumpy at the moment. Yo! What's up, Max? How you doing? Yeah, what's up, John? Fucking whatever, man. Hey, what the fuck? Who pissed in your Cheerios this morning?"
What it means
That is what you toss at someone who's being weirdly grumpy, snappy, or sour for no obvious reason. It is playful, rude, and way less serious than calling them angry outright, which is why it works so well in everyday banter. The breakfast bit makes it funnier, like their whole mood got sabotaged before they even left the kitchen.
Usage examples
"Dude, I just asked if you wanted fries and you looked ready to fight the waiter. Who pissed in your Cheerios this morning?"
"You have been snapping all morning, who pissed in your cheerios?"
"One grumpy reply and I asked him who pissed in his cheerios."
Where it comes from
An American quip, also said with cornflakes, asking what soured someone's morning. The breakfast-cereal image keeps it playful rather than hostile, as if their whole mood got sabotaged before they even left the kitchen.
Editors of this term
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