Cardi B is on social media again …. picking fights with some of her messy fans.

It all started, innocently enough, when Media take Out confirmed that Cardi wore a very cute mink coat as she posed for an Instagram pic.

One of Cardi’s messy fans pointed out that her look – blonde hair and a white mink- resembled a look that rival Nicki Minaj recently wore.

That was enough to set Cardi off. Cardi’s been in a bit of a funk recently. Up until a few weeks ago, Cardi was seen as the top female rapper on the game.

But with the success of Nicki Minaj’s new album Pink Friday 2, Nicki regained the crown from Cardi.

And that loss has Cardi in her feelings … especially when Nicki’s name is brought up.

Nicki Minaj decided to add some extra sauce to what the fan said, by posting how “b*tches [meaning Cardi] are jackin” while she’s “Queenin’” on IG.,

And Nicki’s response was enough to get Cardi to go on an IG rant.

Cardi explained that she’s not “jackin” Nicki’s style, and that she would never do so because “the b**ch can’t even dress.”

We really hope Santa gives Cardi some peace …. and a bit of chill, under her tree tomorrow.