Fred says hi means literally " I am high" but in another term.
The term was originated, from when you smoke weed you are two sided (
schizophrenic ). You are a different person when u smoke weed there for its not *you name*
says hi.
Although you do have control when you are high, unlike alcohol, you still get those trips where u feel like you can not control the high. I.E Fred has taken over.
Its fred, because fred has taken over.
It has been used as a slang all over high schools so that the straight edge kids got no idea, nor do the teachers and parents as well. But what i find is that if you continue to use it constantly everyone will know the term "Fred says hi" and in fact everyone will use use it. Including the teachers
Example:
Yooo dawwwgg Fred says
hiiiiii
you dun know!
Yo i just saw Fred,
that bitch is crazy!
I'm sooooooooooooo fred.
Fred says hi, its not lie
that when u flies in the sky, up high
his spirit will never die!
Your fred u lucky bitch
Have u seen fred, i really need to see him.
FRED SAYS HI BITCHES