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
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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
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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 6, 2004
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When a guy jerks off and shoots the load in his own face.
guy 1: Hey, I'm going to jerk off.
guy 2: OK. Don't forget your cannonball goggles.
by Kevin Dean Nicewanger April 17, 2006
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When you take a bong hit of a newport 100, then pound an entire 40 oz of olde english
Man did u see that scumbag do that cannonball.
by Adam Smirti May 20, 2007
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When you hold your foreskin tightly with your dominant hand, and proceed to urinate within the sealed foreskin vicinity. Wait until maximum pressure is reached, and release upon shower-mates.
Man, Nate got hit with the WORST cannonball yesterday in the locker room!
by NateDun January 23, 2009
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when a male is about to ejaculate and the partner is across the room and the sperm reaches the partner causing it to fly through the air
"lay down over there so i can cannonball you"
by jankydank August 4, 2009
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