dope off

(US, dated, slang, intransitive) To fall asleep or pass out on drugs.

(idiomatic, intransitive) To fall asleep.

(US, slang) To fall asleep.

To cork off is American slang for falling asleep, usually suddenly or when you probably shouldn't — like nodding off on the couch mid-movie or dozing during a long meeting. The phrase has a vintage, mid-century American feel and conjures the image of someone just switching off like a light. It's casual and slightly humorous, more often used to describe someone else's impromptu nap than your own.