round the bend

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

informal or slang terms for mentally irregular
- it used to drive my husband balmy
• Syn:
balmy, barmy, bats, batty, bonkers,
buggy, cracked, crackers, daft, dotty, fruity,
haywire, kooky, kookie, loco, loony, loopy,
nuts, nutty, around the bend, wacky, whacky
• Similar to:
insane
• Derivationally related forms:
loon (for: loony), kook (for: kooky), daftness (for: daft)