How do you say it is not fun in french?

There are a few ways to say "it is not fun" in French, depending on the context and level of formality:

Informal:

* C'est pas drôle. (This is the most common and straightforward way to say it.)

* C'est pas amusant. (Slightly more formal than "drôle.")

* C'est chiant. (Very informal and slangy, meaning "boring" or "annoying.")

Formal:

* Ce n'est pas divertissant. (More formal and literary.)

* Ce n'est pas agréable. (More formal, meaning "not enjoyable.")

Other options:

* Je ne m'amuse pas. (I am not having fun.)

* Je trouve ça ennuyeux. (I find it boring.)

The best way to choose the right phrase depends on the specific situation and who you are talking to.