Dotty

• (a.) Unsteady in gait; hence, feeble; half-witted. • (a.) Composed of, or characterized by, dots.
Found on http://thinkexist.com/dictionary/meaning/dotty/

Dotty

Dot'ty adjective [ From 2d Dot .] 1. Composed of, or characterized by, dots. 2. [ Perh. a different word; confer Totty .] Unsteady in gait; hence, feeble; half-witted. [ Eng.]
Found on http://www.encyclo.co.uk/webster/D/113

Dotty

Dotty is slang for feeble-minded; slightly crazy.
Found on http://www.probertencyclopaedia.com/browse/ZD.HTM
No exact match found