1. any hip-hop or spoken word artist with a speech impediment, such as a lisp, cleft palate, stuttering, or wolling awers.
2. Elmer Fudd's attempt at rapping.
As 300 Spartans attacked the Persians at the Battle of Thermopylae, the Spartan king, Leonidas, yelled "Wapadiashta" and with this sent fear into the bones of the Persians.