The Male art of masteurbation, except using a strong, concentrated stream of water. Usually, these water jets work better when warm. These streams can be found in pools, jacuzzis, showers, and many other assorted devices that use water.
Bro #1: Yo dude get out of the pool nobody else is in there anymore.
Bro #2: Hold on bro im hydrobating, this water jet is awesome!
Bro #1: Aight man, hydrobation is pretty intense so ima let you be.