(Internet slang) secret personal account (on social media, especially Twitter and Instagram (finsta), as opposed to one's openly used account)

Red alpenglow of Mount Fuji in the morning, especially in early autumn.

(Internet slang) protected account (on social media, especially Twitter and Instagram)

a cappella

red turnip (any of several varieties of turnip (Brassica rapa) that are red or purple in color) / radish / beet, beetroot

copper; bronze

(Internet slang) ban from a user account

stingray, specifically whiptail stingray, more specifically red stingray

stingray, specifically whiptail stingray, more specifically red stingray

gound, rheum, eye mucus