Meaning of ZONK OUT

WordNet Dictionary
	Definition:		[v]  fall asleep fast, as when one is extremely tired [v]  lose consciousness due to a sudden trauma, for example
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	Synonyms:		black out, pass out
	See Also:		change state, conk, dope off, doze off, drift off, drop off, drowse off, faint, fall asleep, flake out, nod off, swoon, turn