Shitbag: A person who in a nutshell is/does:
a. ungodly dumbstuff.
b. comes up with the most retarded scenarios.
c. plain and simple is a piece of shit.
1. MJ: Dick my dick off!
CC: Wow! Are you a shitbag!
Noun
A bag of flesh that’s sole purpose is to consume otherwise useful things, i.e., food, time, or knowledge. Then turn them into shit shooting it out both holes, relatively useless and wasteful.