FATHEAD
fathead, goof, goofball, bozo, jackass, goose, cuckoo, twat, zany
(noun) a man who is a stupid incompetent fool
Source: WordNet® 3.1
Etymology
Noun
fathead (plural fatheads)
(derogatory) An idiot; a fool.
A cyprinid fish of the Mississippi valley, Pimephales promelas, the black-headed minnow.
A labroid food fish of California; the California sheephead. Semicossyphus pulcher.
A blobfish, Psychrolutes microporos
Any of several species of fish of the genus Cubiceps
Synonyms
• (derogatory): dunce, imbecile, lout, nincompoop, see also idiot
Antonyms
• (derogatory): genius
Source: Wiktionary
Fat"head`, n. (Zoöl.)
(a) A cyprinoid fish of the Mississippi valley (Pimephales promelas);
– called also black-headed minnow.
(b) A labroid food fish of California; the redfish.
Source: Webster’s Unabridged Dictionary 1913 Edition