Cannonball

Position Information

Tuck position

A male diver performs a reverse in the tuck position from a 3-meter springboard body folded up in a tight ball, hands holding the shins and toes pointed

Learn more about the tuck diving position from Wikipedia. The photo was taken by Ichthyosis and is distributed under CC BY-SA 3.0.

Cannonball

Mons Meg with its 20” (50 cm) caliber cannonballs Round shot (or solid shot, or a cannonball, or simply ball) is a solid projectile without explosive charge, fired from a cannon. As the name implies, round shot is spherical; its diameter is slightly less than the bore of the gun from which it is fired.

Learn more about cannonballs from Wikipedia.

cannonball

A "dive" in which you hold your knees to your chest and hit the water with your fat ass with as much force as possible with the purpose of creating a gigantic splash, thus soaking everyone in the near vicinity.

That cannonball your mother just performed strangely reminded me of the movie "Deep Impact".

Source: Urban Dictionary

Cannonball

On Sep 6, 2009 Diesel Washington released an instructional video entitled "How to Fuck Like Diesel" demonstrating how to perform bully, motorcycle, and cannonball.

Learn more about cannonball from YouTube.