stoned out of (one's) head
Severely intoxicated by drugs, especially marijuana. Sorry, I can't remember what we were talking about last night, I was stoned out of my head. There's no way I'm letting you drive—you're stoned out of your head!
stoned out of one’s head
and stoned out of one’s gourd mod. under the effects of marijuana. Tiffany was stoned out of her head and started giggling. That stuff makes me stoned out of my gourd.