sicko
chemically imbalanced
mentally challenged
depressive
energy vampire
psychotic
tard
psychoneurotic
manic-depressive
pagal
mentally ill
unsound
unstable
wingnut
psychotic person
window licker
potato
psycho
madman
spazzer
mental patient
schizophrenic
depressoid
mad person
chemical imbalance
screwup
sick
automaniac
apiphobe
schizophreniac
psychasthenic
wretchedness
devil-ridden
zombie
paramaniac
mental illness
eleutheromaniac
out of one's mind
clinger
off one's head
psion
delusional
mentalcel
nerve-wreck
sick person
few cards shy of a full deck
sufferer
frail
diseased person
paraphrenic