Two different meanings:
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.