| twisted(adjective, crazy, mad, odd, insane) |
| whacky |
| zany(adjective, knowledge, ability, informal, foolish) |
| bananas |
| bugs |
| cockeyed(adjective, knowledge, ability, informal) |
| delirious(adjective, crazy, mad, odd, insane) |
| demented |
| dippy(adjective, knowledge, slang, ability, foolish) |
| dopey(adjective, knowledge, slang, ability) |
| imbecilic(adjective, knowledge, ability, foolish) |
| jerky(adjective, knowledge, slang, ability, foolish) |
| moronic(adjective, knowledge, ability, foolish) |
| off-the-wall(adjective, crazy, mad, odd, insane) |
| ridiculous(adjective, foolish) |
| sappy(adjective, knowledge, slang, ability) |
| softheaded(adjective, knowledge, ability, foolish) |
| tomfool(adjective, knowledge, ability, foolish) |
| unearthly(adjective, knowledge, ability, foolish) |
| unreasonable(adjective, foolish) |