| nutty as fruitcake(expression, idiom, silly, foolish, mad) |
| obsessed(adjective, controlled, enchanted, preoccupied, gone) |
| off one's rocker(adjective, idiom, sane) |
| psychopathic(adjective, silly, foolish, stupid, irrational) |
| rabid(violent, stupid, fierce, unreasonable, frantic) |
| reasonless(foolish, unreasonable, illogical, insanity) |
| schizo(adjective, silly, foolish, mad, insane) |
| screwball(adjective, silly, foolish, crazy, mad) |
| strange(unusual, silly, foolish, odd, unwise) |
| stupid(silly, foolish, crazy, mad, unreasonable) |
| very angry |
| weird(unusual, strange, silly, foolish, odd) |
| amok |
| amuck |
| around the bend(expression, adjective, idiom, wrong, confused) |
| bats in the belfry(expression, idiom, silly, foolish, mad) |
| bereft of reason(expression, idiom, insanity) |
| brain-sick(adjective, insane) |
| cranky |
| crazy as a loon(expression, adjective, idiom, crazy, confused) |