Milk that is past the "use by" date printed on the container. It will smell bad, taste sour, and will begin to form large nasty chunks. If ingested, can cause many long hours of vomiting and diarrhea.
"Hey you didn't drink that expired milk in the fridge did you?!"

"That was expired! Ew, now I'm going to get sick!"
by Ashlie Mae January 14, 2012
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(noun) Slang that refers to the ejaculate of aging men.
"Have you met Maria and Tom's son? He's weird, that's what happens when you use expired milk."
by d3str0yer June 16, 2024
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