Demented

1. entirely irrational: completely unreasonable or lacking any sense of the consequences of actions taken.

2. affected with dementia: affected by the loss of intellectual functions that is -ssociated with dementia. this usually only happens to elderly (old) people.
my friend’s granpa is demented, he can’t remember a thing.
third shift at the wal-mart supercenter in goshen. see wal-mart mafia
i just went to wal-mart and d-mn those b-tches are demented as a motherf-cker
to be out of one’s head on ecstasy in cork city, ireland
“i’m f-ckin demented, boy!” followed by horrible gnashing of teeth noises
result of sever head trauma, hence, r-t-rded.
-that d-mn son-a-b-tch gowt hit wit dis here club ‘n’ now he aint say nuthin no more.
-that demented moron looks at walls more than t-ts
adjective
1. something fairly absurd which triggers illogical or unreasonable laughter.

2. the new random
after i kicked him, he turned around and proceeded to gape at me with a demented stare.
a really freaky-lookin’ person. usually the person looks r-t-rded and in sp-ce.
your brother looks so demented.
an adjective describing someone is being posed by a demon.
-example-

a young child was possed by a demon and they had to call an exorcist.