Slap Battles is a Roblox arena game built around slapping other players with unlockable gloves, each with its own ability and sound cue. The Killerfish glove's placement effect comes from its ability to set its fish trap, and the short splash-snap clip was lifted from gameplay and shared on user-run soundboards where Roblox audio circulates. Like other game SFX, it spread through slap highlight videos and meme edits, joining the wider Roblox soundboard culture alongside staples like the ROBLOX oof. It stays in rotation because trap setups are a repeatable joke.