Norman Reedus and Brent Hinds: Matching BFF Tatts ... In Honor of Lemmy

It doesn't get more metal than this ...

"The Walking Dead" star Norman Reedus and Brent Hinds -- guitarist for metal band Mastodon -- solidified their BFF status by getting matching tattoos in honor of rock god, Lemmy Kilmister.

We're told Reedus and Hinds hit up Abracadabra Tattoo shop in New Orleans over the weekend for their Lemmy tattoo tribute.

Reedus got a little "Lemmy" ink on the right side of his chest. Hinds went for a small spade design on his arm with an "L" inside the shape -- a la Motorhead's "Ace of Spades" song.

The guys were filming inside Abracadabra Tattoo for Reedus' upcoming AMC biker show that airs later this year.