Young Money emcee Tyga is calling out his ex Blac Chyna for being an unfit parent to their 2-year-old son and is even threatening to file legal docs to claim primary custody.

According to TMZ, the "Rack City" rapper is bothered that Chyna seems more interested in club hopping and twerking than raising their son King Cairo. He's saying that she is more focused on making a spectacle of herself when cameras are around than anything else.

The last straw apparently came when Tyga saw the now viral video of Blac Chyna twerking with her BFF and recent divorcée Amber Rose. When she decided to party that same night he accused her of ignoring her duties as a mother and decided that he was going to take her to court since he "doesn't want his son raised by nannies [TMZ's words]."

Though the former couple does not have a custody order in place, reportedly King Cairo is more often in the care of Blac Chyna and Tyga wants to change that.

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(Photo: Denise Truscello/WireImage)