Gack-pig
A gack-pig is someone who’s tripping on meth and doesn’t know how to stop hogging the pipe until they’re the only one left who can still see straight.
He’s a gack-pig, and he’s been using the pipe nonstop since noon.
She’s a gack-pig, and she’s too high to notice the smoke coming out of her nose.
They’re gack-pigs, and they’re both too messed up to share.