1. A device in Halo used to launch people over large distances, often used in Forge.

2. A penis
1. "Did you see that?! I just sniped that guy while he was being launched across the map by the man cannon!"

2. "Why don't you come over here and check out my man cannon?"
by Mistrissyuki August 15, 2008
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a guys cock that shoots out cannon balls
hey quazzle i bet u like to shoot your man cannon up other guys hershie highway
you damn quaz
by billythesnipe June 15, 2003
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1.I have a huge man-cannon
2.she has a big man-cannon in her hand
3.OMG Look at his man-cannon
by urbanbastard June 11, 2009
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slang for the word penis. about 6-12 inches long.
eh bro, did you smush that chick last night? yeah i used my man cannon to also blow my load all over her titties while she was getting ready to call it a night.
by da coolest guy ever August 19, 2010
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A special phrase for when a girl(or guy)dumps their boyfriend in a brutal way.
Person 1:Hey what happened to Ben?
Person 2:His girl just man cannoned him this morning.
Person 1:.....ouch.
by Cellie October 26, 2007
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"SuckMyGlock45 loves to suck man-cannon until it fires in his mouth"
by MSP2434 May 21, 2008
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