2 definitions by Tom McMot

Top Definition
An impossible dare or challenge in which one man must attempt to touch the back wall of a Disney Store in your local mall, without being greeted by one of the overweight, over friendly employees.

If by some miracle (i.e. they're all in the food court devouring unimaginable amounts of McDonald's and Orange Julius) you make it, everyone owes you roughly fifty dollars.
Jacob: I almost completed the Disney Store Challenge!

Jeff: Almost isn't good enough, you r tard.
by Tom McMot February 18, 2008

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Radiclysmic is the theory that anyone or anything reaching "Absolute Radness" would inevitably cause the destruction of the universe through an intricate chain of subspace explosions, due to the overproduction of Rad particles in nearby stars and star clusters. Not unlike division by zero.

If "Absolute Radness" is achieved in deep space with no nearby stars however, it is hypothesized that there would be little to no repercussions. It is also hypothesized that nearby personnel would become "Totally Rad", phasing them out of what is known as "Weak Space", and into another dimension populated by all the raddest things and raddest people.

It's also an adjective to describe something really freaking awesome.
Ex. 1

Kyle: I got all the achievements in Battletoads.

Kyle is phased into Rad Space, destruction of the universe is imminent.

Ex. 2

Kyle: I got all the achievements in Battletoads.

Jeff: Radiclysmic.
by Tom McMot February 17, 2008

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