A term popularized by the clothing brand Grim5tone, used when one is complementing the outfit or appearance of another. Can also be used as an adjective that the narrator finds appealing, anything can be objectively looking grim, however not everyone has to agree on the grim status of said object.
Bro 1: damn I got these new black cats and they looking grim asf

Ex 2.

Bro 1: rate my fit rq

Bro 2: easy 10, you looking grim fs
by Cherbippleyute February 11, 2022
Get the Looking grim mug.