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.
A mixture of the word "radical" and "cataclysmic". A powerful and large event with sick and awesome connotations.
"Yo Kyle that blood tsunami was soo radaclismic"
"Hey Nathan your mum's lasagne was radaclismic as fuck"
"Man that was trippy, I loved the part where it rained glitter and blood, shit was radaclismic"
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.