Steve Nash -- Pass the Molly ... Strictly for a Movie

Steve Nash wants everyone to know how awesome it was to drop ecstasy pills -- when it was legal, of course ... so he's making a movie about the drug craze.

The ex-NBA MVP is producing the flick centering around the drug's popularity in Dallas in the '80s (h/t BSO) ... when it was legal. We know what you're thinking -- Nash played for the Dallas Mavericks from 1998 to 2004.

The answer is yes, that's when he learned about X ... strictly from talking to people in Big D, of course. Steve told Variety, "After poring over the material I found an incredibly unique story with so many vibrant characters and a bold history known as the origin to the rave scene ecstasy culture."