Meek Mill is still feeling the burn from the Drake feud that blew up in his face -- and he stopped a concert to rip into a fan who dared to support Drizzy.  

Meek was performing in Brooklyn when he spotted the person holding up a Drake sign ... and he absolutely lost it -- "The f**k you talking about you f**king clown!"

Check it out ...'cause this proves the beef is still plenty hot for Meek.

Drake, on the other hand ... has definitely moved on.