doesn't matter, is irrelevant, has nothing to do with
→ 상관없다
상관matter, concern+없not have, be without; be absent, not exist+잖아Reminding / shared knowledge
adjectiveRare#18,295
doesn't matter, is irrelevant, has nothing to do withThe conversational ending -잖아 points out something the speaker assumes the listener knows, often seeking agreement.