secondary account; alt account; backup account
Internet slang for an extra social media or online service account, often used for privacy, testing, or separating identities. Compare with サブ垢.
See also: サブ垢
I post from my alt account without revealing my real name.
I made a secondary account and decided to only talk about my hobbies there.
Common mixed kanji-katakana spelling; 副 means 'sub/extra' and アカ is short for アカウント.
Ateji spelling using 垢 (dirt) for its reading アカ; common in informal online writing but may be confusing to learners.
Abbreviation of 副アカウント (fuku-akaunto, 'sub account'). アカ is a common clipping of アカウント in online slang. The ateji spelling 副垢 uses 垢 for its reading アカ.