noun
abandoned account; unused account; old account
Internet slang for a social media or online service account that is no longer actively used, often left dormant for a long time.
彼のツイッターはもう廃垢になってるね。
His Twitter account has become an abandoned account now.
廃垢を整理して、使ってないアカウントを削除した。
I cleaned up my abandoned accounts and deleted the ones I wasn't using.
Slang abbreviation of アカウント (account); 廃垢 specifically refers to an abandoned or unused account.
Refers to a sub-account or alternate account, often actively used, unlike 廃垢 which implies inactivity.
Compound of 廃 (hai, 'abandoned, disused') and 垢 (aka), a slang abbreviation of アカウント (account). The exact origin is uncertain, but it likely emerged in online communities.