The definition of a scumbag is a person who is dishonest, contemptible, undesirable or sleazy.
(noun)An example of a scumbag is a felon with a long criminal record who shows up drunk at your door to take your daughter on a date.
See scumbag in Webster's New World College Dictionary
☆
noun
See scumbag in American Heritage Dictionary 4
noun
Learn more about scumbag