| dippy(adjective, silly, foolish, crazy) |
| flipped out(expression, silly, foolish, crazy) |
| freaked out(expression, silly, foolish, crazy) |
| mad as a March hare(expression, idiom, silly, foolish) |
| mad as a hatter(expression, adjective, idiom, silly, foolish) |
| mentally strange(expression, silly, foolish, insane) |
| nutty as fruitcake(expression, idiom, silly, foolish) |
| screw loose(expression, silly, foolish, insane) |
| zany(adjective, silly, foolish, crazy) |
| absurd(adjective, simple, wild, silly, foolish) |
| ape(silly, foolish, crazy, insane) |
| bedlamite(adjective, simple, silly, foolish, crazy) |
| dingy(silly, foolish, insane, unwise) |
| eccentric(adjective, wild, silly, foolish, crazy) |
| erratic(silly, foolish, insane, unwise) |
| flaky(adjective, simple, silly, foolish, crazy) |
| flipped(silly, foolish, crazy, insane) |
| foolish(adjective, simple, wild, silly, stupid) |
| harebrained(adjective, wild, silly, foolish, stupid) |
| preposterous(adjective, wrong, wild, silly, foolish) |