The act of hanging on your ceiling fan and dropping a large log into your partner's rectum, thus slapping her innards. The vagina can work too, but she may not like it.
Dude, I totally wanted to The Cannonball Slap to your sister last night.
by Eric DontTryThisAtHome BigDick December 7, 2010
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Driving as fast as you can fron NYC to LA in heavily modified cars, usually in about 29-33 hrs and sustained speeds over 100 MPH and not get your ass busted buy the cops. Record top speed is 175MPH/112 sustained. Fuckers are moving.
Where's Dave?
He's cannonballing rn
Hope he don't get his ass busted by the cops
by PowerSlavebytheMaiden December 21, 2022
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The act of eating a cannonball. Not legal at the public pool.
Cannonballism is a bad habit that could pose a threat to your health, as eating cannonballs is not good.
by Dagingerly1 March 31, 2023
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