The phrase comes from wider gaming slang, most closely tied to 'git gud,' the deliberately misspelled taunt that spread through Dark Souls forums and PvP lobbies in the early 2010s. It was never real advice, just shorthand for 'that loss was on you.' As short form video and Discord soundboards took off, the two words were clipped into a standalone reaction that needs no context. It survives because it works anywhere competitive, from shooters to fighting games, whenever someone wants to end an excuse with a joke.