dillbrain
Proposed by a contributor, not yet supported by evidence.
Meaning · English
A fool.
Register: derogatory, slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “dillbrain” mean?
A fool.
Is “dillbrain” formal or informal?
dillbrain is generally derogatory, slang.