A shiny kitchen sink.
- The definition of a kitchen sink is the sink in the kitchen of a home or restaurant.
The place where you wash your dishes is an examples of a kitchen sink.
- showing a lack of discriminating thought or careful planning; random; indiscriminate: his kitchen-sink collection of souvenirs
- Chiefly Brit. portraying life, esp. domestic situations, with realism that emphasizes the negative or sordid aspects
(plural kitchen sinks)
Probably from everything but the kitchen sink