A mildly derogatory slang term for a stupid or foolish person, derived from the mock-scornful exclamation 'der' (also spelled 'duh') used to imply that something obvious has been missed. The compound frames the target as someone who responds to everything with a slow, dull 'der'. Largely dated in current use but still comprehensible and occasionally deployed for retro comic effect.
He locked his keys in the car for the second time that month -- total der-brain move.
No comments yet — say something.
(slang, derogatory) A fool.
No comments yet — say something.
Add your own interpretation of "der-brain".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.