Mickey Rourke says he's done messing around -- and vows to bash Lenny Dykstra's face in the next time he seem him ... and he's DEAD. SERIOUS.
Remember, Rourke initially called Dykstra out after the ex-MLB star went on Howard Stern and claimed Mickey owes him $30k from back in the day ... insinuating it was drug related.
Dykstra fired back -- saying Mickey's face was an insult to the facelift industry.
Now, Rourke has apparently had enough -- and in one of the most rage-filled, angry rants we've ever seen ... the actor swears on everything he loves that he will "knock all his f***ing teeth out again."
Dykstra ... don't say we didn't warn ya ...