1. a perpendicular or very steep descent of the water of a stream.
2. something resembling a waterfall.
3. a perpendicular or somewhat steep descent of bottom of a swimming pool, or another bowl made for skateboarding. used mostly for allowing experienced skateboarders to develop more speed and flow while riding said pools and/or bowls.
4. the type of skateboard terrain that is gayrab's biggest fear. one of many fears of the Southern California manatee.
"It's very interesting to note that E. Groff is still harboring ill feelings towards people whom of which favor skating waterfalls. He needs to grow up, learn how to skate, and quit his everday drivel and whining."