poontab
One who doesn't understand basic ethics of life, and intends to live without meaning and usually does't make the right choices. Extend the "oon" for more dramatic effect.
Poooooooonnnntab!
Shoot the J poontab, SHOOT IT!
You silly asshole, what a poontab.
Shoot the J poontab, SHOOT IT!
You silly asshole, what a poontab.