A person who is pretty damn awesome, there so cool they can wear a rainbow and be cool hence, rainbow fish.

Got the covid-19 vaccine

an emoish girl. The biggest whore ever. Dies her hair a new color every week.

Your rainbow fish is the person who everyone thinks you like but you don't really like. Rainbow fish is for teasing purposes and for confusing people who don't understand what it means. It can become very annoying.

When a large woman, preferrably black to be politically correct, has a group of men, each wearing a different colored condom, all pleasing her fish at the same time. Such an act must be done for her to recieve pleasure, as a normal penis would not supply nearly enough meat to fill her fish.

male equivalent of a fruit fly