Gaby

I daresay I made a gaby of myself to the world

Source: wiktionary

His wrath, then, was proportionately violent when he was aware of two boys, who stopped close by him, and one of whom, a fat gaby of a fellow, pointed at him and called him "Young mammy-sick!"

Source: wiktionary

"[Y]ou're a jobbernowl and a doodle, a maundering mooncalf and a blockheaded numps, a gaby and a loon; you're a Hatter!" I shrieked the last epithet.

Source: wiktionary

"You pair of gabeys!" she exclaimed. "You'll see him before the night's out."

Source: wiktionary