Jas Prince -- You Only Get ONE Warning, Birdman ... Pay Up My Drake Fee Now!

The clock is ticking very loudly for Birdman -- because the guy who discovered Drake says he's done talking about the millions he's owed for hooking up Cash Money with Drizzy.

Jas Prince talked to us about the lawsuit he recently filed ... as he was leaving Mr. Chow in Bev Hills. We asked if there's been any progress with Birdman on the financial front, and it's clear he -- like Lil Wayne and Turk -- doesn't have much left to say about the debt.

Keep in mind ... it was Jas' dad, James Prince, who issued a very threatening "courtesy call" to Birdman.

Watch the vid -- sounds like the whole Prince family is getting impatient.