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1.
Energy radiated in the form of waves or particles
My genitals were exposed to radiation so now I am sterile.
by go mountaineers August 10, 2006
 
2.
The word frequently shouted by people who look like nuclear owls when choosing a map on Call Of Duty: Black Ops
Me and my friend were playing the xbox when our ears were invaded by a lone player shouting Radiation
by BadBadMooCow October 01, 2011