A blub is the German pet name for a water bong, due to the noise it makes as the chronic passes through the water. Also known as a Blubber or a Blubbi.
The bong went blub, blub, blub then he looked up at her through bloodshot eyes and said ooooooh yeah!
The blackest and one of the most versatile words in the human vocabulary, Blub is a term used to define anything which is untasteful. It can be used to describe a state of being or a single thought or emotion. However, it is not a word that can be accurately put to use as an insult, for example, Calling someone "A blub" or anything else defining blub as a singular object is completely innacurate, as blub truly is in and of itself.
It is a word that should only be used in the most vile and dire of circumstances.
Person 1: "How's it going today?"
Person 2: "Blub."
-or-
Person 1: "I'm so sorry. Your mother has passed away."
Person 2: "...Blub."