| jerk(noun, slang, sick, mad person) |
| jerk-off(noun, slang, sick, mad person) |
| knee-jerk(noun, slang, sick, mad person) |
| loom(noun, slang, sick, mad person) |
| loon(noun, slang, sick, mad person) |
| looney(noun, adjective) |
| looneybin(noun, slang, sick, mad person) |
| loony tune(noun, slang, sick, mad person) |
| lunatic(noun, adjective) |
| mishoogeh(noun, slang, sick, mad person) |
| mishugah(noun, slang, sick, mad person) |
| nougat(noun, slang, sick, mad person) |
| nutcase(noun, slang, sick, mad person) |
| nutjob(noun, slang, sick, mad person) |
| paranoiac(noun, adjective) |
| psychotic(noun, adjective) |
| schiz(noun, slang, sick, mad person) |
| screw-loose(noun, slang, sick, mad person) |
| trainwreck(noun, slang, sick, mad person) |
| weener(noun, slang, sick, mad person) |