Big Sean isn't mincing words when it comes to his ex-fiancée Naya Rivera.

According to TMZ.com, Sean's new diss-filled tune "I Don't [expletive] With You" is aimed right at "Glee" star Rivera.

In the song, Sean, 26, calls Rivera, 27, everything from a bird brain to some nastier pieces of language.

"I just dodged a bullet from a crazy b---h," he raps in the song.

Sean called off his engagement to Rivera in April, reportedly because she was too controlling and demanding.

But Rivera is certainly doing well post-split: In July, she walked down the aisle with a new love, actor Ryan Dorsey, in Cabo San Lucas, Mexico.