radioactivity 

The common reason many comic book superheroes have superpowers. A prime example would be the Fantastic Four.

"'Why does he have superpowers?'. Well, he was...um...well, he was born a mut...no...um...he was bitten by..no, they've done that...uh....Oh, hell just do the old radioactivity thing."

radioactivity by Blackbird July 12, 2005

Radio Activity 

Radio Activity; in it's most obscure definition. Is when cops come and seize your contraband.

The bikers are not happy with the 'Radio Activity'. The general consensus indicated a co-op.

Radio Activity by Bryn Benn March 27, 2020

Radioactivist 

An advocate for nuclear power.

"Split don't emit!", "Save the plants, save the Planet", "Only U Can Prevent Climate Change"? Gotta hand it to the radioactivists, they know how to come up with a rad protest chant.

Radioactivist by Pseudonius Rex January 25, 2023