1.The act of using a cafeteria tray as a toboggan (to sled down a snow covered hill on ones ass). For advanced traybogganers, an alternate form is to break the tray in two halves, and place one under each foot before going down the hill while standing.
Note: Proper form is to have balls, take a full sprint towards the hill, then jump and land with ones ass on the tray.
Related to tobogganing
He broke his leg traybogganing.
Dude, I just made a sick jump to go traybogganing off of.
Skywalker is the best at traybogganing, he invented the crazy two-foot style!