cognosce
flip one's wig
mattoid
psycho
craze
incompetent
derange
cray-dar
wet end
stultify
automaniac
attention whore
loon
fossilise
screw loose
fossilize
space case
head game
crack up
have a screw loose
nutburger
détraqué
autopsychically
jackaninny
full deckism
gaslight
clown shoe
muppet
sad sack
mindfucker
few cards shy of a full deck
wig out
slut
mad person
insane
fuckhead
Homer Simpson
cockbag
come unhinged
hillbilly
psyche
lolcow
arsehead
spack
spacky
headcase
bungler
asshead
abnormal psychology
bushwhacker
one's elevator doesn't go all the way to the top
lose one's marbles
profane
dingus
defective
lunatize
pit one's wits
gimboid
psychostatically
wackadoodle
vesania
attention seeker
mess up
distraction
fucktwat
scum
idiotic
impulsivist
maddening
shitfucker
cuntfucker
mindfuck
shitfuck
fruitloop
cuntfuck
misfit
cunthead
nutter
cuntbag
seducer
trick
live one
zombify
manic
head-game
dipshit
Alice in Wonderland
delusionist
delusionality
delusively
psychoanalyser
drive someone crazy
lame
crackpot
impulsive
aberration
dichocephalic