Slungus is a female rabbit, as mentioned in the Twitter account's bio. When questioned, Aden Mayo stated that there are 2 Aden Mayos; Aden Mayo, the Item Asylum Developer, and Slungus, the composer for Item Asylum. This is most likely a joke. Slungus also makes cameo appearances on some other maps, such as clue, mandrill, and grenzemall.

Adds an image of Slungus to the user’s screen. slungus pet is a VIP-exclusive item in item asylum. While slungus pet is equipped, the player will be prompted, “Click to gain a PERMANENT slungus.” Using the item consumes it, causing an image of slungus to appear near the bottom right corner of the screen; this is only visible to the player.

slungus is a lobby in item asylum. It's a reference to a video by the Composer of Item Asylum, Aden Mayo, featuring a pet bunny of the twitter user @mg_0313 which is often referred to as " Slungus ". Everything in the lobby, including the skybox, has the slungus decal pasted on it. Players will spawn on a platform with various things around them.

slungus pet is a VIP-exclusive item in item asylum. While slungus pet is equipped, the player will be prompted, “Click to gain a PERMANENT slungus.” Using the item consumes it, causing an image of slungus to appear near the bottom right corner of the screen; this is only visible to the player...