Kylie and Tyga are finished … dunzo … for good-zo.

Sources connected to the former couple tell TMZ … it happened days before the Met Ball last week. They were both at the gala, but they did not walk the red carpet together, and that was her decision.

kylie-jenner-zoom-1dad2fef-076d-490a-bbed-3e46edd5f384As for why … everyone’s being tight-lipped, but we do know this. Tyga took his mom and a model to Mother’s Day lunch … and he’s not telling his friends whether she’s his new GF.

We also know this … the breakup was acrimonious. We’re told Kylie was bent out of shape that Tyga had the nerve to go to the Met Ball.

“WE’RE MARRIED!” — Grace Gealy Announced

He was only invited because of her, and she’s mad at herself that she didn’t think to have him made persona non grata.

The 2 have broken up before, but we’re told this time there’s no going back.