I came across this phrase in the title of an article from TechOrange (a super great Chinese language tech news website by the way. You should bookmark it now!).
洗洗睡（xǐxǐshuì）is a fun Chinese internet slang term, which means something like “wash up and get to bed” or “don’t waste your energy”. Check out the article and see why they think Android no longer has a lead on iOS.
In case you were curious, to describe this meaning in Chinese it would be:「洗澡（洗臉）刷牙睡覺去吧」(“wash up and get to bed”) -or-「不要白費力氣了」(“don’t waste your energy”)
Now whether or not what the article says is true, well, I guess we’ll find out this fall!