Green’s Dictionary of Slang

(US) a stupid, obnoxious person.

1965		P. Wylie Esquire July 44–45: hodad—objectionable, non-surfing hanger-on.
a.1966		Richard Farina ‘Hard Loving Loser’ 🎵 He’s the kind of surfer got a hodaddy haircut and you wonder how he’ll ever survive.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxv 6/2: hodad: A layabout.
1977		R. Coover Public Burning (1979) 120: That hodag’s known to have a lotta contacts.
1989		Smithsonian June 116: Etymological relics like ‘Cowabunga!’ and ‘hodad’ have been replaced [among surfers at Malibu] by essential phrases like ‘Awesome!’ and ‘clueless dweeb’.
2023		(con. 1962) J. Ellroy Enchanters 138: ‘Bob Bereglund is a nosebleed, a nimrod, a ho-daddy and a pseudosurfer’.