psycho
lunatical
not wise
insaniac
maddening
insane
insane in the membrane
loony tunes
Ophelian
loony
deranged
insano
potty
one brick short of a full load
maniacal
gobaloon
meshuggener
not right in the head
cuckoo for Cocoa Puffs
mad
out of one's mind
doolally
crazed
half-crazed
nutso
hatstand
stark raving mad
bughouse
cracked as an egg
crackers
gone fishing
nutzoid
jimjam
nutballs
few cards shy of a full deck
half-cracked
unglued
non compos mentis
mad as a March hare
stark staring mad
hysteretical
mad as a fish
off-minded
crazy as a cootie
becrazed
crazy as a cootie bug
reality challenged
lunatic
nuts
daft