Japanese for "goldfish poo"; specifically, a string of expelled poop that has failed to detach from the fish's anus so that it trails behind the fish as it swims.
A Japanese expression used either endearingly or annoyingly to describe a person or animal that literally follows someone (usually a parent/caretaker) wherever they go.
"Our Akita and 4 year-old are inseparable. They follow one another all over the house all day like each other's kingyo no unko
. It's so cute."
"A celebrity's entourage is just glorified kingyo no unko