Tyga Sued By Former Manager ... He Was NOTHING Before Us!

Tyga's former manager says the rapper's an ingrate and now there's only one way to show his appreciation ... fork over several million dollars as a "thank you."

Back in the day ... Tyga hired C&J Management, and the company claims it did more than a good job, "turning him from a relative nobody to a world known superstar." C&J introduced Tyga to Cash Money, so they may have a point.

But sometimes people and Tygas move on ... and C&J claims the rapper unceremoniously and illegally fired them in 2013 and hired a brand spankin' new manager.

So C&J now wants $4 million and all will be well.

We reached out to a rep for Tyga. So far, no word back.