Dog Residue comes from Undertale, the indie RPG created by Toby Fox and released in 2015. In the game it is a joke consumable tied to the recurring Annoying Dog, a small white dog that steals items and clutters the player's inventory as a running gag. Clips of its menu interactions spread through Let's Plays, soundboards and meme edits, where the item became shorthand for useless loot. It is still used because Undertale's fanbase remains active and the sub-second length makes it perfect for quick comedic punctuation.