round-the-bend

(s) informal or slang terms for mentally irregular
- it used to drive my husband balmy
around the bend, balmy, bats, batty, bonkers, buggy, crackers, daft, dotty, haywire, kookie, kooky, loco, loony, nuts, barmy, fruity, loopy, nutty, wacky, whacky, cracked,

around the bend balmy bats batty bonkers buggy crackers daft dotty haywire kookie kooky loco loony nuts barmy fruity loopy nutty wacky whacky cracked