Kanye West -- BOYCOTT LOUIS VUITTON

Kanye West just ordered all of New York City to stop buying Louis Vuitton ... STAT!

Kanye was on 92.3 NOW radio station moments ago when he handed down the edict, saying, "Everybody in New York City right now, don't buy any Louis Vuitton until after January."

Kanye says he's trying to make a point to the head of Louis Vuitton, Yves Carcelle, who refused to meet with the rapper the last time he was in Paris.

Kanye's point ... Yeezy's got power and influence ... and he's using it to teach Frenchie a lesson.

FYI, Kanye's been on an anti-fashion crusade recently, claiming the world's top designers have essentially blackballed him from the industry because he's a black rapper.