boudrin can be described as anything or anyone. You decide somebody can be a boudrin. Something can be a boudrin you can act like a boudrin its all up to you
When you are doing something that is not the socially accepted norm and it often makes no reasonable sense to other people why you are behaving in such a manner.
Don is bolding whenever he smokes a cigarette because he unconsciously (or consciously) smokes it as fast as possible and ends up with a cherry the size of your thumb.
When Don arrives at a bring and braai with no food or drink, and proceeds to eat a second helping before people that brought food have even had one helping, we say to ourselves "Oh yes. Don is bolding again"