Used to describe an extremely awesome and/or epic person of the highest level. The word originates from Hassan Wattoo, one of the awesomest guys in the history of ever. People usually compare someone to Hassan Wattoo to show that that person is really awesome.
Daaaaammn that guy is so awesome he's almost as epic as Wattoo.
The new Batman movie was Wattoo epic.
I wish i was as cool as Wattoo.