Ressaca is the Portuguese word for hangover, and also for the strong undertow after a wave, which helps explain the double joke behind its use online. The clip circulates in Brazilian meme edits and group chats as a ready-made reaction for the morning after, shared in short videos where no extra explanation is needed. Because the meaning is instantly clear to Portuguese speakers, creators reuse it for tired, seasick or overwhelmed moments as well, keeping it popular as a flexible meme sound beyond its literal sense.