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2.
The only definition on Urban Dictionary with the actual ². It basically means Energy=Mass X Speed of light squared. Simple, eh?
Wow! Somebody knows how to do the ² in E=MC²!
by glaires April 04, 2010
 
1.
The mass-energy equivalence was one Albert Einstein's most famous work and caused him much celebrity. As such, E = mc² came to mean a formula for success.
Cameron Mitchell: Even if the valley wasn't filled with Jaffa, we could never have made it to the gate and dialed out in under . . . ten seconds.
Martin Lloyd: Good. See, that's why we're here. So what do you think, thirty seconds? Maybe not such a round number. How about . . . thirty-eight!
Daniel Jackson: What difference it does it make? I mean it's not like you're going to have an actual ticking clock on the screen.
Martin: That's brilliant!
Daniel: That's ridiculous.
Martin: Trust me, jeopardy plus ticking clock is box office. It's the E = mc² of the entertainment world! Ask any executive.
by cshin9 July 16, 2012