This line comes from Warcraft, Blizzard's long-running real-time strategy series, where human peasants are the basic worker units who gather resources and build structures. When players select or command a peasant, the unit replies with a short acknowledgement, and in the French version that reply is Oui, messire, meaning yes, my lord. Fans have lifted these click responses onto soundboards for years because they are instantly recognisable to players, and this polite, old-fashioned phrasing makes it perfect for jokes about obedience, servitude and taking orders without question.