This line comes from For Honor, Ubisoft's melee fighting game built around knights, vikings and samurai, where the Highlander is a heavy Viking hero known for his claymore and Scottish taunts. The phrase became a favourite among players because it is so unexpectedly silly for a brutal warrior, and clips of it spread through gameplay videos, streams and soundboards. It remains popular as a short, instantly recognisable taunt for edits about overconfidence, revenge kills and absurd defeats.