a versatile suffix added to many offensive words to describe a person. classically used with root word "douche", modern insult artists now utilize it with other more offensive root words.
douche-bag. fuck-bag. cock-bag. fag-bag. ass-bag. shit-bag. cunt-bag. sack-bag. etc
urbandictionary isa fucking cock-bag because it wouldnt accept my examples as just douchebag, fagbag, or assbag; no, the fucking shitbag of site wants me to type them in with a dash. what a cuntbag.