Exp is gaming shorthand for experience points, the reward players earn for completing tasks and defeating opponents, so the phrase fits naturally into clips about levelling up. As a short meme sound, it has circulated on soundboards and in short-form gaming edits, where creators use it to punctuate a sudden gain, a lucky kill, or an unexpected improvement. Its appeal comes from its simplicity and timing rather than a single famous scene, and it remains useful because levelling up is a familiar moment in almost every game.