What does Ball Clankin' mean?

Ball Clankin' meaning in Urban Dictionary

With the balls actually having nothing in connection with it, but at first thought by others to have already been employing the balls to make the magical sound ball clankin creates. Its an action where your slap your dick against your stomache, ideally when it is damp from the bath, to get the good clankin sound that it produces to piss down your roommates at the beginning of the early morning.