Marlon Wayans -- I Call All My Friends N Word ... Even White Chicks

Marlon Wayans has just filed legal docs defending an Instagram post in which he called an extra from his movie "Haunted House 2" a n**** and a Cleveland lookalike ... saying the N-word is a term of endearment, and the dude DOES look like Cleveland.

Marlon says in the docs -- obtained by TMZ -- he grew up in the projects of NYC, where black men and women frequently used the N-word (with both an "a" and an "r") as a colloquial term of camaraderie.

Wayans says he doesn't restrict use of the word to his black friends, bragging in his declaration he calls his "Haunted House 2" co-star Jaime Pressly the N-word too. And get this ... Jaime filed her own declaration saying, "Mr. Wayans has addressed me as n**** in the past and frequently uses it as a term of endearment with his friends and family."

As for the photo that triggered the lawsuit ... Marlon says it's ridiculous. Pierre Daniel posed for the pic and even has a scene in the movie where he's referred to as Cleveland.

So separated at birth.