| screwball(adjective, silly, foolish, insane) |
| demented(adjective, silly, foolish, crazy) |
| flaky(adjective, light, silly, stupid, crazy) |
| loco(adjective, slang, crazy) |
| mental(adjective, silly, foolish, insane) |
| out to lunch(expression, adjective, idiom, silly) |
| touched(adjective, silly, foolish, insane) |
| unbalanced(adjective, silly, foolish, insane) |
| unzipped(adjective, slang, crazy) |
| bats in the belfry(expression, idiom, silly, foolish) |
| cracked(adjective, silly, foolish, crazy) |
| crazed(adjective, silly, foolish, crazy) |
| doolally(adjective, slang, crazy) |
| flipped(silly, foolish, insane, unwise) |
| flipped out(expression, silly, foolish, crazy) |
| freaked out(expression, silly, foolish, crazy) |
| fruity(silly, foolish, insane, unwise) |
| mad as a March hare(expression, idiom, silly, foolish) |
| mad as a hatter(expression, idiom, silly, foolish) |
| mentally strange(expression, silly, foolish, insane) |