Slap Battles is a Roblox fighting game released in 2021 where players use different gloves to slap opponents off the arena, and critical hits mark the stronger, rarer hits that send rivals flying. As Roblox clips spread on YouTube and TikTok, players began lifting the hit sound for edits outside the game, much like the ROBLOX oof became a shared shorthand for a character taking damage. The clip stays popular because it instantly signals a powerful blow, even for viewers who have never played Slap Battles themselves.