O que significa "He's out cold"?

1. unconscious

2. asleep

3. alcohol intoxicated, drunk (probably from the fact that you lose consciousness when you drink to much)
Don't bother, he's out cold.


Source: Urban Dictionary.

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http://idioms.thefreedictionary.com/out+cold




out cold and out like a light

1. Fig. unconscious. I fell and hit my head. I was out cold for about a minute. Tom fainted! He's out like a light!
2. Fig. intoxicated. Four beers and he was out cold. He sat in his chair at the table, out cold.
3. Fig. sound asleep. After a few minutes of tossing and turning, she was out like a light.
See also: cold, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.