Definitions by Popizzle

Sharking 

The act of flipping an unsuspecting person's inner tube (as they are in the seated position), most commonly performed in the lazy river or wave pool.

Girl #1: Did you see those dudes sharking those old people in the lazy river?

Girl #2: Yeah, I saw a couple of them doing somersaults.

Sharking by Popizzle August 25, 2011