monstrocious

Blend of monstrous +‎ ferocious, or blend of monstrous +‎ atrocious; or back-formation from monstrosity after ferocity, atrocity.

monstrocious (comparative more monstrocious, superlative most monstrocious)

1. (rare) monstrous
   • 1853, William E. Flashman, Plain thoughts and rules for the interpretation of prophecy‎, London: Simpkin, Marshall & Co., page 26:

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

   • 2013, August 9, Arlene Benham The Quoddy Tides Vol.45 No.16 "Photos spark shark-killing investigation":

     Fishermen "are not the monstrocious killers everyone's portraying," Guptill says. "They're not in the business to annihilate species; we want [a future fishery] for our children."

2. (informal) enormous; frighteningly or impressively large
   • 1938, Chambers's Journal, volume 7, page 271:

     "Ef he ain't de beatenest chil' !" she wheezed; "namin' dat monstrocious dawg after de Jedge !"

   • 2012 April 4, Isai Rocha, “MLB Opening Day: Craziest Eats From Ballparks Across the Nation”, in Foodbeast:

     MLB’s opening day is officially here, and we’re celebrating here at Foodbeast by highlighting some of the most monstrocious food that is being introduced around Major League ball parks.