1) A heavy metal ball swung on a cable from a crane and used in demolition work.
Also, wrecking ball .
2) A sexual act in which a male gently slaps his testicles against his partner's face. This can be done in one swing, or several times, imitating a wrecking ball motion.
“I’m gonna give them the old wrecking ball.”
“Dude that’s gay.”
"Well... I'm still gonna do it."
These peculiar marks I'm scrubbing off the bowl look like someone has shat a wrecking ball.