go out like a light
Verb
Meaning
go out like a light (third-person singular simple present goes out like a light, present participle going out like a light, simple past went out like a light, past participle gone out like a light)
(simile) To fall asleep quickly.
Synonyms
swoon
black out
hit the sack
hit the hay
zonk out
go to sleep
pass out
conk out
doze off
drift off
flake out
nod off
keel over
sack out