The phrase comes from Spanish speaking gaming slang, where mochila, meaning backpack, is used for a player who contributes little and has to be carried by stronger teammates, and manco describes someone playing badly. Clips like this circulate in party chats, streams and short gameplay edits because the line is understood instantly inside that community. It works less as a quote from a single famous scene and more as a quick reaction, posted after a failed play to tease a friend without writing a full insult in chat.