Alley-oop

Alley-oop – Typically performed on a quarterpipe or in a halfpipe, is a spin maneuver performed in the opposite direction of the air.  For example, spinning clockwise while traveling right-to-left through the air on a quarterpipe, or  performing a frontside rotation on the backside wall of a halfpipe would make the spin an alley-oop.  It is sort of like a revert with an extra 180.