scumbag "condom," by 1967, slang, from scum + bag. Meaning "despicable person" is attested by 1971. Etymonline. I found a condom reference back to 1939 in this snippet from the American Journal of Orthopsychiatry, Volume 9. The date seems accurate: And I found this figurative use of the phrase from Chandler Brossard's 1953 The Bold Saboteurs: More @Wikipedia
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