From Wiktionary, the free dictionary
From shit + rag.
shitrag (countable and uncountable, plural shitrags)
(vulgar)
- (countable, slang) A terrible newspaper.
- (countable, slang) A rag used for additional wiping after defecating.
- (uncountable, US, slang) Toilet paper.
- (countable) Term of abuse.
