Brim is short for Brimstone, we all know his cake is thicker than Reyna's cake. Brims ass hair is essentially pubes which stands for dick hair, however in this case we are explaining his ass hairs. His ass hairs are pretty thick and soft. If you decide to touch it, it wont hurt you. It can be a little bit wet sometimes, but that's not the issue here. In all, Brim's ass hairs stand for brims ass cheek pubes.
Brim's ass hairs is the hair that is located on brimstone (Character from valorant)'s ass