Insta-dumb 

when you pop a pill or take a hit and stare blankly into space while drooling with your mouth open because its so strong it hits you hard.

Friend: "whats wrong with him?"
Me: "he just smoked some strong. It's got homeboy insta-dumb."

Insta-dumb by xTETRODOTOXINx April 9, 2015