| idiotic(adjective, silly, foolish, trivial) |
| psycho(silly, foolish, crazy, insane) |
| unglued(adjective, crazy, odd, insane) |
| bats in the belfry(expression, idiom, silly, foolish) |
| berserk(adjective, silly, foolish, crazy) |
| distraught(adjective, crazy, odd, insane) |
| flipped(silly, foolish, insane, unwise) |
| flipped out(expression, silly, foolish, crazy) |
| freaked out(expression, silly, foolish, insane) |
| mad as a March hare(expression, idiom, silly, foolish) |
| mad as a hatter(expression, idiom, silly, foolish) |
| mentally strange(expression, silly, foolish, insane) |
| moonstruck(silly, foolish, insane, unwise) |
| nutty as fruitcake(expression, idiom, silly, foolish) |
| schizo(adjective, silly, foolish, insane) |
| screw loose(expression, silly, foolish, insane) |
| twisted(adjective, crazy, odd, insane) |
| agonized(adjective, crazy, odd, insane) |
| ape(silly, foolish, crazy, insane) |
| dingy(silly, foolish, insane, unwise) |