when your balls are hung low and sway side to side with ease

Unusually large glans on a penis.

When you take a shit that is so long that as it falls from your ass, it leans forward and bumps into the back side of your balls like clanging a bell.

to flick ones balls. testicles if u will.

To reach from behind, grab the wiener, and yank down firmly, causing the balls to clank together. Bonggggg!

When you're fucking a bitch and your nuts clap against her anus making a sound