1) English-language idiom 2) Quick bit of shutEYE 3) Short nap 4) Slang for sleep 5) Some shuteye 
To take forty winks is to take a nap for a short period of time (usually not in bed), or to take a short sleep during the day. The term Forty winks is an English idiomatic noun that can be used in the singular or plural. This can be used in sayings such as `Tomas Faherty had 40 winks during his dinner hour, while Brett was busy at work.` Alterna.....
Forty winks is slang for sleep.
a short nap.