Pew pew has long been the spoken imitation of a laser or toy blaster, borrowed from comic books, cartoons and space shooters long before short soundboards existed. Online, the fourfold repetition became a standalone meme cue because it needs no setup: viewers hear the rhythm and immediately understand a fake shootout is happening. Creators reuse it in gaming edits, skits and reaction videos where a real effect would be too heavy, and the cartoon timing keeps the scene light, readable and easy to share across platforms.