This likely refers to the Roblox term of Retroslop.
From the Roblox Outfit Styles Wiki, “Retroslop is a controversial and loosely defined term in the Roblox community. At first, it was used for avatars that try to look retro but end up feeling fake or not well done. These avatars often mix real classic items with modern accessories in a way that clashes or doesn’t match, resulting in a avatar that doesn’t have the smooth or nostalgic feel of the retro styles.
Over time, the term “Retroslop” became the name of the style, even though most people dislike the name because it was originally used as an insult against the style.”
