Lil Wayne: Sued for 'Birdman-Like' Bad Conduct

Lil Wayne is being sued by his own lawyers who claim the rapper did to them what Birdman did to him ... screw him out of a fortune.

Pretty ironic if true ... Wayne hired a law firm to fight Cash Money and Birdman over millions in unpaid fees. The hired guns say they sent bills to Wayne for nearly a year, but got blown off.

All told, the lawyers say Wayne owes them $375k.