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1.
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".
by Nick D November 23, 2004
 
2.
The term cannonball was first used by Carl Kearney Spackler (Bill Murray) in the masterpiece film Caddyshack. To do a cannonball you must first fill your lungs with weed smoke, while holding the smoke in you drink liquor. Preferably Johnnie Black. And take big swig not a little pussy shot. Then exhale. Say "Cannonball" and pass the bong and Johnnie black to your boy n-word Drew and repeat until liquor is finished (nobone in their right mind would ever run out of weed.) The best time for cannonballs is wednesdays at 10:30 during the Chappelle show. The best mix for this is Johnnie Black and Sour Diesel from the wiseman, Veil.
After I Kobed her I took a few cannnballs.
by Lenox February 19, 2004
 
3.
Taking a hit of weed, throwing down a shot of hard liquor, and then exhaling your hit. A crowd of people will usually yell "CANNON BALL" while you are in process of taking this shot. Please be warned....this could lead to a very rough night. But in the end, you will be CRUNK! If using Tequilla, it is recommended that you appoligize to all those around you in advance as you will make a scene.
"Hey Mark, wanna take a shot?"

"Yeah, but let me hit this blunt first."

Mark takes a huge hit off the blunt, slams a shot of Tequilla, then exhales and pounds his chest. (In the background, the whole party is yelling CANNON BALL)
by Mark Pearson August 12, 2006
 
4.
A sexual act in which a man places a testicle into the woman's vagina and she queefs it back out with force.
Genny gave me a nice cannonball last night.
by Tom Bry October 01, 2007
 
5.
First Mate of the Seamen of the South
known for accuracy over speed, as he is fat and slow
AKA CB
hey wheres CB?
he hasnt caught up yet
by flickyobeanz December 16, 2004
 
6.
A metallic, spherical object that does not hover nor float. Often shot out of a cannon.
The feather floated. Much in the way a cannonball does not.
by fiddle November 06, 2004
 
7.
An underachieving fantasy football team owned by a man who is consistent w/ wearing a visor to the draft along w/ drafting Fred Taylor every year. Rumor has it that he uses the league as an excuse to get out of his house once a year and party.
The Cannonballs are not going to make the playoffs again.
by J.P. Shepherd August 26, 2007