Seriously, WHAT? Are you telling me this is a feature and not an ugly bug? WHY?
It’s called an eyebrow pencil. It’s why males don’t have any at all.
It suits the general fakeness of the species, with underhand deals and money over everything. Also the anti-nature aspect.
You know eyebrow pencils come in more than one color, right?
If you want to be consistent, then you also have to argue that Thrall and female orcs have penciled-on eyebrows too. Which sounds absurd.
Hey honey, we don’t have time to dye our eyebrows too.
Besides, 80s Madonna is a LOOK.
They use crushed up beetles to make the colour-- it’s the only thing that really takes to sensitive goblin skin without causing rashes.
Male orcs shave them off to look more macho when the sweat drips off their brow in battle.
Thrall keeps his for the patented Spirit Man© look.
Obviously.