"Out for the count" is an idiomatic expression that means to be unconscious, usually after a knockout in a boxing match. There are several synonyms for this phrase, including out cold, knocked out, asleep, passed out, blacked out, and in a coma. These phrases all convey the idea of being completely unconscious or unable to function. Some colloquial alternatives to "out for the count" include "down for the count," "out like a light," and "dead to the world." Regardless of the phrasing used, all of these expressions suggest a state of complete physical and mental incapacitation.