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Related to dotty: ditty
adj. dot·ti·er, dot·ti·est
a. Mentally unbalanced; crazy.
b. Amusingly eccentric or unconventional.
c. Ridiculous or absurd: a dotty scheme.
2. Having a feeble or unsteady gait; shaky.
3. Obsessively infatuated or enamored.
[Probably alteration of Scots dottle, silly, from Middle English doten, to dote.]
adj, -tier or -tiest
1. slang chiefly Brit feeble-minded; slightly crazy
2. slang (foll by about) Brit extremely fond (of)
3. marked with dots
[C19: from dot1: sense development of 1 from meaning of "unsteady on one's feet"]
adj. -ti•er, -ti•est. Informal.
1. crazy or eccentric.
2. very enthusiastic or infatuated (usu. fol. by about or over).
adj. -ti•er, -ti•est.
marked with dots.
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|Adj.||1.||dotty - informal or slang terms for mentally irregular; "it used to drive my husband balmy"|
bats, batty, bonkers, buggy, around the bend, balmy, crackers, daft, haywire, kookie, kooky, loco, loony, nuts, round the bend, wacky, whacky, nutty, loopy, fruity, barmy, cracked
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
|2.||dotty - intensely enthusiastic about or preoccupied with; "crazy about cars and racing"; "he is potty about her"|
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
enthusiastic - having or showing great excitement and interest; "enthusiastic crowds filled the streets"; "an enthusiastic response"; "was enthusiastic about taking ballet lessons"
adjective (Slang, chiefly Brit.) crazy, touched, peculiar, eccentric, batty (slang), off-the-wall (slang), potty (Brit. informal), oddball (informal), loopy (informal), crackpot (informal), out to lunch (informal), out there (slang), outré, doolally (slang), off your trolley (slang), up the pole (informal), wacko or whacko (slang) She was obviously going a bit dotty.
Afflicted with or exhibiting irrationality and mental unsoundness:
brainsick, crazy, daft, demented, disordered, distraught, insane, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, off, touched, unbalanced, unsound, wrong.
Chiefly British: crackers.
Law: non compos mentis.