sleep, siesta, afternoon nap

I have found a rather interesting word in the dictionaries.  It is written as 午覺 and said as ngou5gag4 and explained in Mandarin as  睡眠. AND wu3jiao4 午覺 in Mandarin is siesta - having an afternoon sleep.

So the question is how do we say "siesta" in Diosua Ue?  Do we actually say like what LLL say - ngou5gag4?  

I know I do not say afternoon sleep as ngou5gag4.  哈哈

Did you know we are the only Chinese people who have siestas in the afternoons in China, while the other Chinese are so busy making money?  Between gongfu cha and wuziao - I wonder what else we do or not do.