1.NounA personal social media (chiefly Instagram) account separate from one's public or main account, where one generally posts more raw, personal content, compared to the main account which features more polished, curated posts.
"She only shares her spam account with her closest friends."
2.NounUsed other than figuratively or idiomatically: see spam, account.
"I keep getting emails from spam accounts trying to sell me certain pharmaceuticals."