Of forbidding or fear-inspiring aspect; fierce; stern; surly; cruel; frightful; horrible.

not to be placated or appeased or moved by entreaty; "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"

shockingly repellent; inspiring horror; "ghastly wounds"; "the grim aftermath of the bombing"; "the grim task of burying the victims"; "a grisly murder"; "gruesome evidence of human sacrifice"; "macabre tales of war and plague in the Middle ages"; "macabre tortures conceived by madmen"

causing dejection; "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather"

characterized by hopelessness; filled with gloom; "gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"; "took a grim view of the economy"; "the darkening mood"

Grim is a fictional character from the television series The Grim Adventures of Billy and Mandy. He is the Grim Reaper, the personification of Death, here portrayed as a scythe-wielding skeleton in a black hooded robe. His accent and use of patois suggest that he is Jamaican.

GRIM is a band with several influences including punk/hardcore/emo to name a few. from the Philippines.

death omen, very big, with wide, gleaming eyes

Used to denote any cave trip or cave that is extremely unpleasant. "Grim" also usually implies a wet and/or dangerous trip.