Riding a skateboard while under the influence of marijuana where the experience can be compared to riding a hoverboard from Back to the Future 2.
"Man, I blazed before taking the board out. I was Marty McFlying all afternoon!"
by D2U3R4 May 08, 2009
1 more definition
To walk backwards haphazardly, usually resulting in an unwanted encounter or physical altercation. Derives from Marty McFly from "Back to the future", as this action usually precedes a very bad event.
That kid over there was Marty McFlying all over the store and knocked down the tower of sodas.
by F. Millmore April 22, 2010