The line comes from StarCraft, Blizzard Entertainment's real-time strategy game first released in 1998, where the Terran Marine is the basic ranged infantry unit players command in battle. Marines have a set of short, personality-filled responses when selected or ordered to move, and this eager request for a target became one of their most quoted lines. As StarCraft clips and soundboards spread online, it moved beyond the game into memes and edits, where it still works as a quick shorthand for impatience and readiness to fight.