Caucasian Saturday is a holiday that occurs on every Saturday the 14th, the day after a friday the 13th. On this day it is customary to drink the alcoholic beverage that this day is named for, the caucasian. Also known as a White Russian, the Caucasian consists of vodka, coffee liquor, and cream.
Person 1: Why have you consumed 10 White Russians today, brother?
Person 2: Duuude! Its Caucasian Saturday! Grab a glass!
That extreme flushing of the cheeks a white person gets when eating food other cultures would consider barely noticeably spicy. E.g. Americanized Indian food from a chain restaurant.
"What's wrong with Matt? His cheeks look really flushed, is he alright?"
"Oh he's fine, he just had some 'really spicy' chicken tikka masala from Punjabi Palace. It's just Caucasian Glow.