| flake(noun, slang, sick, mad person) |
| fruitcake(noun, neurotic, worrier, valetudinary) |
| loon(noun, slang, sick, mad person) |
| luny(noun, slang, sick, mad person) |
| nutjob(noun, slang, sick, mad person) |
| oddball |
| schizo(noun, slang, sick, mad person) |
| basket case(noun, slang, sick, mad person) |
| coo-coo(noun, slang, sick, mad person) |
| crack-brain(noun, slang, sick, mad person) |
| crack-skull(noun, slang, sick, mad person) |
| cuckoo(noun, slang, sick, mad person) |
| dement(noun, neurotic, worrier, valetudinary) |
| fruit-cake(noun, slang, sick, mad person) |
| goo-goo(noun, slang, sick, mad person) |
| goof(noun, slang, sick, mad person) |
| head case(noun, expression, neurotic, worrier, valetudinary) |
| insane person(noun, expression, person, worrier, valetudinary) |
| jerk(noun, slang, sick, mad person) |
| jerk-off(noun, slang, sick, mad person) |