Products that were once useful to humans but not anymore. Yukkuris are the exception, they are also trash despite never being useful for humans.
Organic trash (a.k.a leftovers) are the primary food source of gutter trash yukkuris. Due to their ability to turn trash into sugar rich bean paste, some yukkuris are made to eat trash as a composter.
The following tags are aliased to this tag: garbage (learn more).