| unzipped(adjective, slang, crazy) |
| absurd(adjective, simple, silly, foolish, crazy) |
| bats in the belfry(expression, idiom, silly, foolish) |
| berserk(adjective, wild, silly, foolish, crazy) |
| cockeyed(adjective, slang, crazy) |
| delirious(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) |
| idiotic(adjective, simple, silly, foolish, crazy) |
| irrational(adjective, silly, foolish, crazy) |
| mad as a March hare(expression, idiom, silly, foolish) |
| mad as a hatter(expression, adjective, idiom, silly) |
| mentally strange(expression, silly, foolish, insane) |
| nutty as fruitcake(expression, idiom, silly, foolish) |
| pixilated(adjective, slang, crazy) |
| preposterous(adjective, silly, foolish, crazy) |
| schizo(adjective, silly, foolish, insane) |
| screw loose(expression, silly, foolish, insane) |