lunkhead
[noun]
Synonyms: dunce, boob, booby, chump, dolt, dolthead, fathead, goof, goon, oaf

[TahlilGaran] English Synonym Dictionary ▲

lunkhead noun

1. a stupid person
   Word Originmid 19th cent.: probably from an alteration of lump + head.

[TahlilGaran] English Dictionary ▲