The phrase takes its name from BO2, the shorthand players use for Call of Duty: Black Ops II, the 2012 first person shooter that became a staple of montage culture. Short voice commands from shooters often travel beyond the game as soundboard clips, shared for their instant energy and recognisable tactical tone. This one spread in gaming edits and meme compilations where a serious military line makes fast or reckless play funnier. It remains popular because it signals intent in under four seconds, setting up a rush, a challenge or a highlight without needing any context.