One who professes ignorance on the knowledge of whether or not any gods exist, or even what the term means. It is a play on the words "ignorant" (to lack knowledge) and "gnostic," (knowledge pertaining to gods).
It's partially the noise an explosion makes, mixed with the word "explode" itself. Plus it's a cool word, I use it all the time. Basically it just means "explode" but it's cooler. Because I said it is.
"Whoah, that thing just kersploded!"
A Paladin build in WoW (World of Warcraft). It is a variant of the healadin with 21 points in the Retribution tree to obtain both Holy Shock and Sanctity Aura, in order to be both a successful healer and a decent DPS'er, mostly for PvP.
Shockadins give up a little in survivability but make up for it in DPS.