Sittas

Sittas is the name of a greek guy who likes to drink pee, he is also white and has a small buttock

Sitta comes from the Swedish word "sitta", which means sit in English, which refers to the Danish saying "slå røven i sædet", that roughly is translated to "hit your ass in the seat", which reminds you of an ass.

So basically "sitta" is an ass.
The word "sitta" is not for a positive use!