NFL superstar Von Miller just can't leave his mouth alone ... cause the SB MVP has copped yet another INSANE custom grill ... and TMZ Sports has pics of the $57K creation.
We kinda knew it was gonna happen ... when Miller hit up celebrity jeweler Johnny Dang to cop his 1st grill -- a $47K monster -- back in March we were told a 2nd was already in the works.
The new one's here now ... and it's crushing the starter piece, featuring yellow 18kt gold, VVS princess and baguette cut diamonds and boasting a $57K price tag .