It's not an idiom because you can figure out what it means. It's just a slangy way of describing sleep. If you don't sleep a wink, you figuratively never closed your eyes, even to wink. It's an exaggeration.
"Getting some winks" is a common idiom for getting some sleep. If someone is said to have not slept one wink, that means he/she basically wasn't able to sleep at all, either due to events during the day constantly interfering or due to a bout of insomnia.
It's not an idiom, it's a saying. If the horse is blind, it can't see either the nod or the wink, so they'd mean the same thing to the horse. You nod when you're agreeing and you wink when you're sneaking around with something.
it means go to sleep
I Couldn't Sleep a Wink Last Night was created in 1943.
A person that didn't sleep a wink is someone who got almost no sleep at all, and to catch 40 winks is to catch a very brief but refreshing nap. The number 40 has a wide range of citations in the Bible and may have some application to this expression.
Something that can happen really fast or in the "blink of an eye"
Wink (' to wink')
yes toads can blink how do you think they sleep
It means that sometimes you need to pretend you didn't see something harmless, but sometimes you need to be firm and notice things if they are bad or harmful.
it depends on how big the bag is, if you know what i mean 'wink wink' ;)
complex.
If you snore, you sound like someone sawing logs -- therefore, it means to sleep deeply and usually to snore.