| demented(adjective, silly, foolish, mad, insane) |
| deranged(adjective, silly, foolish, mad, insane) |
| eccentric(adjective, strange, silly, foolish, crazy) |
| flipped out(expression, adjective, silly, foolish, mad) |
| freaked out(expression, adjective, silly, foolish, mad) |
| kinky(adjective, strange, crazy, absurd, wacky) |
| kook(noun, slang, sick, mad person) |
| kooky(adjective, silly, foolish, mad, insane) |
| luny(noun, slang, sick, mad person) |
| mad(adjective, silly, foolish, insane, unwise) |
| mad as a March hare(expression, adjective, idiom, wild, silly) |
| mad as a hatter(expression, adjective, idiom, wild, silly) |
| maniacal(adjective, silly, foolish, mad, insane) |
| mentally strange(expression, adjective, silly, foolish, mad) |
| not all there(noun, adjective, slang, sick, mad person) |
| nut(noun, slang, sick, mad person) |
| nutter(noun, slang, sick, mad person) |
| nutty(adjective, silly, foolish, mad, insane) |
| nutty as fruitcake(expression, adjective, idiom, wild, silly) |
| out to lunch(expression, adjective, idiom, wild, silly) |