| round the bend(expression, adjective, idiom, silly, foolish) |
| unhinged(adjective, silly, stupid, crazy, mad) |
| dippy(adjective, light, silly, stupid, mad) |
| goofy(adjective, light, silly, stupid, crazy) |
| irrational(adjective, wild, silly, foolish, stupid) |
| of unsound mind(expression, adjective, idiom, silly, mad) |
| senseless(adjective, wild, silly, foolish, stupid) |
| certifiable |
| disturbed(adjective, unstable, irrational, unbalanced, unhinged) |
| eccentric(adjective, keen, warm, wild, silly) |
| maniacal(adjective, silly, stupid, crazy, mad) |
| asinine(adjective, silly, foolish, stupid, crazy) |
| bughouse |
| crack-brained(adjective, insane) |
| disordered(adjective, confused, insane, irrational, distracted) |
| kookie |
| moronic(adjective, silly, foolish, stupid, crazy) |
| out to lunch(expression, adjective, idiom, silly, mad) |
| stupid(adjective, wild, silly, foolish, insignificant) |
| around the bend(expression, adjective, idiom, wrong, confused) |