pass out
pass out {v.}, {informal}
1. To lose consciousness; faint.
She went back to work while she was still sick, and finally she just passed out.
Compare: GIVE OUT (3).
2. or {slang} pass out cold
To drop into a drunken stupor; become unconscious from drink.
After three drinks, the man passed out.
3. To die.
Life came and went weakly in him for hours after surgery; then he passed out.
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Source: A Dictionary of American Idioms