Falling asleep (sometimes passing out) after a night of drinking and waking up a few hours later feeling rested and refreshed.
Very similar to beauty sleep, except booze was involved prior to sleeping... and last night's memory might be blurry or non-existent.
Antonym: hang over
Dude, I need to get my boozey sleep. I got work in 5 hours!
I hate people who don't get hang overs and have a boozey sleep instead!