Working title

A working title is like a temporary name for something that might change later on.

Imagine you are coloring a picture, but you don't know what to call it yet. So you give it a name like "Rainbow Mountain" even though it might not actually look like a rainbow or a mountain in the end. That's your working title, and you might change it later if you think of a better name that suits the picture more.

People use working titles for lots of things, like movies, books, and even projects at school or work. They're like a placeholder until someone comes up with a better name.