UseCode_ROBLOXMuff (known on YouTube as ROBLOXMuff) is an American Roblox player and a former YouTuber with over 210,000 subscribers. He is part of the Roblox Video Stars Program and he used to upload trolling videos. His group, ROBLOXMuff Fan Group, has over 20,000 members.
- He often does fan meetups in which he joins a meetup game and then announces in his fan group's shout that he is in the game and is willing to meet fans.
- In May 2018, he created a shirt named the ROBLOX # # ## Fan Shirt" and put it on sale for 500 Robux. He said that he would friend users who purchase the shirt. He later took the shirt off-sale in June. By then, it had received 92 sales.
- Users who purchased the shirt were outraged that he unfriended some users who purchased the shirt months later.