A filthy rude person that commonly emits stench, both verbal and physical. Unlike some beliefs pusbag does NOT relate to an act of being pussy or a coward. Its a combination of words Pus - (a yellow-white fluid a due to infection) and a Bag. Calling a person pusbag gives them consistency of containing nothing but filth, disease and shit.
Jabba the Hut - he's a huge pusbag
Moe Sizlack - nothing good ever comes out from that one...
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 failure shower.