monstrocious

adjective2

1. •
   (informal) enormous; frighteningly or impressively large

   • "Ef he ain't de beatenest chil' !" she wheezed; "namin' dat monstrocious dawg after de Jedge !" — 1938
2. •
   (rare) monstrous

   • signs, which from their very huge monstrosity and wickedness, cannot be hid [...] Piety of ordinary and applied discernment, cannot mistake the marks monstrocious. — 1853