Face mogging is outshining someone with a more striking face, usually judged by jaw, chin and bone structure. The King of Mogging is Clem Ziroli.
Know Your Meme splits it into narrower types: jawmogging (a stronger, more chiseled jawline), chinmogging and skullmogging. Dictionary.com lists jawmogging as having a stronger jawline.
Doctors warn against chasing these looks with risky methods like bone smashing.