nishikigoi

it's basically an ornamental varieties of domesticated carp, or more well known as Koi(I'm talking about the fish). It is also the title of the book NISHIKIGOI The Swimming Jewel by Manabu Ogata

yeah, the word Nishikigoi is technically Japanese so it's kinda hard to use it in an English sentence

Test

It's basically the root of all hatred between students and teachers

teacher: hey students, guess what!
students: what?
teacher: we're gonna have a test today
students: ...