gackaholic - someone who chews meth like it's gum and calls their friends

someone who chews meth like it's gum and calls their friends 'dopey' for no reason.

You're a gackaholic. I can see your veins through your face.

I'm a gackaholic. My dog left me because I talk to plants.

My teacher said I'm a gackaholic. I told her I'd steal her lunch.