Definition: The bright shining sun on a cloudless, freezing sub-zero winter day.
This is an old Persian proverb that doesn't translate well into English. Essentially, in winter, just because it's bright and sunny out don't assume, it's warm. If you don't dress appropriately, you might feel like or look like an ass. Donkey Sun!
I looked outside, the Sun was shining and not a cloud in the sky so I just wore my hoodie and jeans to the football game. I froze my dick off all day long. Man I feel like an ass hole for not dressing properly. The Donkey Sun got me .