a foolish person
WordReference Random House Unabridged Dictionary of American English © 2025
fat•head
(fat′hed′),USA pronunciation n.
- Slang Termsa stupid person;
fool. - Fishsheephead.
- FishSee fathead minnow.
- fat + head 1830–40
Collins Concise English Dictionary © HarperCollins Publishers::
'fathead' also found in these entries (note: many are not synonyms or translations):