DOTTY
crazy, wild, dotty, gaga
(adjective) intensely enthusiastic about or preoccupied with; “crazy about cars and racing”; “they are dotty about each other”; “gaga over the rock group’s new album”
balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky
(adjective) informal or slang terms for mentally irregular; “it used to drive my husband balmy”
Source: WordNet® 3.1
Proper noun
Dotty
(uncommon) A diminutive of the female given name Dorothy, also spelled Dottie.
Etymology 1
Adjective
dotty (comparative dottier, superlative dottiest)
(British, colloquial) Mildly insane or eccentric; often, senile.
(UK, dated) Having an unsteady gait.
Etymology 2
Adjective
dotty (comparative dottier, superlative dottiest)
Having many dots.
Noun
dotty (plural dotties)
(Multicultural London English) A shotgun.
Source: Wiktionary
Dot"ty, a. [From 2d Dot.]
1. Composed of, or characterized by, dots.
2. [Perh. a different word; cf. Totty.] Unsteady in gait; hence,
feeble; half-witted. [Eng.]
Source: Webster’s Unabridged Dictionary 1913 Edition