Whoa, whoa, I'm radioactive, radioactive
Whoa, whoa, I'm radioactive, radioactive

from Imagine Dragons – Radioactive Lyrics on Rap Genius

Meaning

This feeling of revolution, awakening, etc. that the narrator has is very strong. He takes the strength of it literally and compares it to the exposure of radiation, and that is why he “feel[s] it in his bones”.

More literally, radioactivity is also one of the effects of dropping a nuclear bomb. Like most of the song, this line can be taken literally or metaphorically. Incidentally, about a month before this song came out, it was discovered that North Korea’s nuclear bomb testing was causing Radioactive gases to escape in the area.

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