The phrase combines Brazilian slang, with mlk short for moleque and valeu meaning thanks, directed at Blizzard Entertainment, the studio behind games such as World of Warcraft, Diablo and Overwatch. Short voice clips like this circulate on Brazilian soundboards and in gaming communities, where players reuse them as instant reactions during streams and edited videos. Its popularity comes from the ambiguity of the thanks, which can sound sincere after a reward or deliberately sarcastic after a bug, a server issue or an unpopular change, making it reusable across many different gaming moments.