Sludge content (also known as content sludge and overstimulation videos[1]) is a genre of split-screen video on the social media platform TikTok.
Characteristic of sludge content is unrelated, attention-grabbing side content, meant to increase viewer retention.[2] Common attention-grabbing videos include repetitive mobile gameplay (notably of the endless runner mobile game Subway Surfers) and ASMR/oddly satisfying clips.[3] Sludge videos typically feature one panel of main content with audio, often copyrighted material. Common copyrighted material include television episodes (notably of the adult animated television series Family Guy),[4] Reddit posts read by an artificial voice,[2] and videos made by other TikTok users.[3]
Sludge content has been labelled as overstimulating and addictive.[1][3][5] The genre has been described as reflecting and contributing to declining attention spans,[5][3] though these interpretations have been criticized.[3] Sludge content may also lead to normative dissociation, which can be soothing.[6]