| screw loose(expression, adjective, wild, silly, foolish) |
| screwball(adjective, silly, foolish, mad, insane) |
| screwy(adjective, silly, foolish, mad, insane) |
| twist |
| unglued(adjective, wild, silly, foolish, mad) |
| whacky |
| ape(adjective, silly, foolish, mad, insane) |
| aper(adjective, silly, mad, confused, insane) |
| bananas |
| barking mad(expression, crazy, mad, insane) |
| being rash and foolish(expression, crazy, mad, insane) |
| berserk(adjective, silly, foolish, mad, insane) |
| buck wild(expression, crazy, mad, insane) |
| bugs |
| crazed(adjective, silly, foolish, mad, insane) |
| daffy |
| delirious(adjective, silly, foolish, mad, insane) |
| demented(adjective, silly, foolish, mad, insane) |
| deranged(adjective, silly, foolish, mad, insane) |
| dingy(adjective, silly, foolish, mad, insane) |