The act of playing multiplayer in a video game without participating because your friend has progress in your world. Common in Sandbox games like Minecraft, Terraria, and Starbound.
Person 1: "Hey, wanna play some Terraria?"
Person 2: "Nah, I want to watch some TV."
Person 1: "Just boot it up and cuckold singleplayer. I want to finish my house!"
Person 2: "...I beg your pardon?"
Person 2: "Nah, I want to watch some TV."
Person 1: "Just boot it up and cuckold singleplayer. I want to finish my house!"
Person 2: "...I beg your pardon?"
by Mr. Enderman October 3, 2022