A dumbass is a person who always mooches off others. Typically of the hemp persuasion. Signs: Quite possibly into the Grateful Dead / likes to talk about conspiracy theories.
Person 1: Hey man, did you know if you light your cigarette backwards its 7 years bad mental health? Tobacco industries planned that filter to be hazardous to your mental health. Can I bum a smoke?
Person 2: WTF are you talking about? And no, you can't have any of my cigarettes, you bumbass.
Person 1: Oh dude, harsh. Chomsky was fucking right!
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.