| cuckoo(adjective, silly, foolish, mad, insane) |
| insane(adjective, silly, foolish, mad, unwise) |
| kookie |
| loopy |
| mad(adjective, silly, foolish, insane, unwise) |
| potty(adjective, wild, silly, foolish, mad) |
| bats in the belfry(expression, adjective, idiom, wild, silly) |
| eccentric(silly, foolish, unwise) |
| flaky(adjective, silly, foolish, mad, insane) |
| flipped(adjective, silly, foolish, mad, insane) |
| flipped out(expression, adjective, silly, foolish, mad) |
| freaked out(expression, adjective, silly, foolish, mad) |
| goofy(silly, foolish, unwise) |
| mad as a March hare(expression, adjective, idiom, wild, silly) |
| mad as a hatter(expression, adjective, idiom, wild, silly) |
| mentally strange(expression, adjective, silly, foolish, mad) |
| nutty as fruitcake(expression, adjective, idiom, wild, silly) |
| of unsound mind(expression, adjective, idiom, wild, silly) |
| out to lunch(expression, adjective, idiom, wild, silly) |
| schizo(adjective, wild, silly, foolish, mad) |