In the sking episode of South Park, it was how the kids learned to ski by stopping by forming a pizza shape with his skies and forming two french fries to go faster.
*Going down the hill*
Stan - Pizza...French Fries. Pizza...French Fries.
Mental; not quite all there. Acting mental. Not thinkin' before acting. Weirdo. Doing stupid shit that makes no sense...like without thinking. Not acting very bright. Meant not as a compliment but as a wake up and start thinking with your brain type of comment.
I dunno what to tell you man. That boy is a few french fries short of a happy meal..that's fo' sure!