What is 3 0?
To 3 0 is to gargle one others balls. The 3 then represents the ball sack and the 0 to represent the mouth in which the 3 enters.
Joe Jonas has just had a tough day so Kevin decides to 3 0 (AUGH AUGH AUGH) Joe's balls to help Joe relax.
See gargle, balls, ball sack, augh, mouth