Top Definition
Large, extraterrestial beings who are from Outer Space. Those lucky enough to be able to communicate with these large bugs are able to command them to rape people they dislike up the butt.
If you ever do that again, I'll send a firefly after you.
I hope you like insect penis, a-hole.
Radioactive fireflies are the shheeeeeeeiiiitttt.
by HaleyFaceHoeSkank April 09, 2008
7 Words related to Radioactive Fireflies

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