The line comes from a viral gaming voice chat moment where one player calmly tried to defuse another player's anger with the phrase 'it's only game.' Shared widely on YouTube, forums and later Twitch and Discord soundboards, the mispronunciation of 'have' as 'heff' made it easy to quote and search. It survived because competitive games constantly produce the same situation it mocks, so creators keep reusing it as shorthand for telling an angry player to calm down.