Main entry: crazy, looney, loony, nutcase, weirdo
Definition: someone deranged and possibly dangerous
Main entry: cracked, crackers, daft, dotty, haywire, round the bend, loco, loony, loopy, kookie, kooky, balmy, barmy, bats, batty, around the bend, wacky, whacky, buggy, bonkers, nuts, nutty, fruity
Definition: informal or slang terms for mentally irregular
Usage: it used to drive my husband balmy