2. A penis
2. "Why don't you come over here and check out my man cannon?"
2.she has a big man-cannon in her hand
3.OMG Look at his man-cannon
All of the above.
A: Some gadgetry in Halo 3 that throws a player either high up or far out into the distance, only to be sniped, skeet shot, or a battle rifle massage in the back when he or she lands.
B: A bunch of jocks that take a scrawny or morbidly obese high school student, one holds each arm, then they sling the 'ammo' into a crowd or another scrawny kid or morbidly obese person at terminal velocity. Side effects to mancannoning someone can include, but is not limited to, temporary paralysis, permanent paralysis, eating concrete or other terrain, fractures, sprains, death, fights, embarrassment, disciplinary action, and commonly, unexpected gas.
B: I mancannoned Ned into fatty just now. It was funny until we found out he had to get his face reconstructed in plastic surgery.