Check your melanin
Something heard only in League of Legends lobbies. We don't know exactly what it means, but it sounds like it goes hard for an insult. Something to do with the pigment of your skin.
player 1: "bro y'all are ass just runnin it down giving them free pentas"
player 2: "stfu check your melanin kid"
player 2: "stfu check your melanin kid"