Secar is long standing slang in Brazilian football for supporting whoever plays against your rival, and Mengão is the affectionate nickname for Flamengo, the Rio de Janeiro club founded in 1895. The phrase ficou acordado até tarde secando o Mengão became a ready made taunt in group chats and meme pages, aimed at rival supporters who stayed up for a late kickoff only to see Flamengo win. Shared as short audio, it keeps circulating because Brazilian match banter repeats every round, especially after dramatic late results.