| unbalanced(adjective, silly, foolish, insane) |
| crazed(adjective, silly, foolish, insane) |
| mentally ill(expression, adjective, insane, sane) |
| non compos mentis(expression, adjective, idiom, law) |
| of unsound mind(expression, adjective, idiom, silly) |
| mad as a hatter(expression, adjective, idiom, silly) |
| maniacal(adjective, silly, foolish, insane) |
| psycho(silly, foolish, insane, unwise) |
| silly(adjective, foolish, insane, unwise) |
| bats in the belfry(expression, idiom, silly, foolish) |
| deranged(silly, foolish, insane, unwise) |
| dippy(silly, foolish, insane, unwise) |
| flaky(silly, foolish, insane, unwise) |
| flipped(silly, foolish, insane, unwise) |
| flipped out(expression, silly, foolish, insane) |
| freaked out(expression, silly, foolish, insane) |
| mad as a March hare(expression, idiom, silly, foolish) |
| mentally strange(expression, silly, foolish, insane) |
| mindless(insane, psychiatric) |
| nutty as fruitcake(expression, idiom, silly, foolish) |