Green’s Dictionary of Slang

totty-headed adj.

[SE totty, unsteady, dizzy, befuddled]

foolish, giddy.

[UK]B.E. Dict. Canting Crew n.p.: Totty-headed Giddy-headed, Hare-brain’d.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[Aus]Sydney Morn. Herald 26 Jan. 161/3: Another totty-headed lamebrain American comedy about college jocks and chicks.