fopdoodle
A stupid person; a fool, a simpleton.
obsolete
And though you overcame the Bear, / The Dogs beat you at Brentford Fair; / Where sturdy Butchers broke your Noddle, / And handl'd you like a Fop-doodle.
Where it comes from
From fop (“vain man, dandy”) + doodle (“(obsolete) mindless person, fool, simpleton”).
Adapted from the Wiktionary entry fopdoodle (CC BY-SA 4.0).