An individual who under the influence of marijuana seems to lose even a basic ability to interact with his/her environment. Typically in this state pottards exhibit obsessive compulsive behavior where they attempt to perform a task without any logical reason. Pottards do not seem capable of grasping the sheer depth of their behavior and as such are a burden to those around them.
"Why is Joe trying to open the bar's bathroom door with his keys?"
"He's a pottard, just grab his jacket and I'll put him in a cab."