irrationalize
derationalize
go batshit
pop one's cork
flip one's wig
have a screw loose
lose one's wits
take leave of one's senses
go potty
loco
drive someone crazy
lose one's mind
becraze
go mad
spaz
outstupid
think no end of oneself
outjig
derp
lunatize
mope
distract
dumb
unreason
scare someone out of their wits
rationalise
craze
rationalize
phony
go ballistic
go crazy
unnaturalize
duncify
not have both oars in the water
hyperexaggerate
idiot-proof
mislead
overmanipulate
ineffectualize
fool
blockhead
ham
play silly buggers
crazen
faken
booby
stupidify
take the piss