1.) When you're extra full of rage! Derived from Gyarados, "the atrocious Pokemon".
ex. 1.) Gyarados can literally make water, fire, electric, dragon, ground, psychic, dark, ice, steel, poison, and normal attacks, not to mention its sharp fangs, massive size, red eyes, stank face, the fact that it evolves from Magikarp, and has no fucking chill and will kill you instantly via lightning strike, fire blast, or tsunami..... thats quite atrocious..... gyaradoscious ex. 2.) that bitch is straight gyaradoscious before 9am.