Radioactive Crack Monkey Share definition Flag A man who is acting extremely hyper and social, though they are usually calm and detached. I say, Tom sure is being one hell of a radioactive crack monkey today. Radioactive Crack Monkey by Porkman385 November 11, 2008 0 0 Get merch Get the Radioactive Crack Monkey mug. Buy Now — $32.95 See more merch