To my dear Mektwain and the gang:
Forty winks is an English idiomatic noun that can be used in the singular or plural and means: to take a nap for a short period of time (usually not in bed), or to take a short sleep during the day.
To emphasise that forty winks was a nap not taken in a bed Lewis Carroll used the idiom in his novel Sylvie and Bruno when the main protagonist is constantly nudged by the Master of Ceremonies who is saying, I can’t let you sleep here! You’re not in bed, you know!; he replies, I know I’m not, I’m in an arm-chair, whereupon the Master says, Well, forty winks will do you no harm and walks off.
…done this before? *wink, wink x20*