Sicktionary: U

Underflip [uhn-der fl-ip]noun Spinning frontside and dropping your front shoulder after the first 180, so as to start flipping mid-spin.


Usher [uhshhh-urrrr] noun: The antithesis of the Michael Jackson, an Usher is a 50-50 slid on your heel edge. The Usher has been known to bruise more prepubescent butts than Michael Jackson himself.


UV: Short for ultraviolet, UV refers to light which has a wavelength shorter than other, more visible varieties. Goggles and sunglasses protect wearers from ultraviolet rays. Unfortunately, these items do very little to protect wearers against ultra-violence.