A person of Oriental/Asian Ancestry. A derogatory phrase derivative from the United States bombing of Hiroshima and Nagasaki during the Second World War, and the subsequent radioactive fallout - hence their children are "radiobabies." Despite applying only to Japan, this word is used as a pejorative term for all similar Asian ethnic groups, including Koreans, Chinese, Vietnamese, etc....
You should have seen this radiobaby, he was in the middle of the dance floor going crazy with some glow-sticks!
by whatyeahwhat September 10, 2010

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