Wet and Messy, a fetish revolving around gloopy, slimy, or wet substances and cute subjects covered in them. Bodypaint can be messy, as can certain types of foodplay.
Somewhat rare in Anime/Manga style art, although certain sub-types (paint, nyotaimori) are gaining popularity.
Similar tags in Danbooru are Nyotaimori (human plates), Wet, Slime (Substance), Paint, Bodypaint, etc.
See also
- WAM Xxxnovel-Wetandmessy.Com, PIL's eroge