A person who always does everything so perfectly that it makes him an asshole. For example, selling more items than you.
Also could be a woman who is extremely annoying.
Wow, that guy is such a flawlass. He's always just doing better and we can't compete!
The short and lazy way of saying Chirstmas.
If you're tired and someone asks you what happens on 12/25 you would say "uhh, crimis"