the head or brains: use your noddle!
WordReference Random House Unabridged Dictionary of American English © 2026
nod•dle
(nod′l),USA pronunciation n. [Older Slang.]
- Slang Termsthe head or brain.
- late Middle English nodel 1375–1425
Collins Concise English Dictionary © HarperCollins Publishers::
to nod (the head), as through drowsiness
'noddle' also found in these entries (note: many are not synonyms or translations):