Rex Ryan Tattoo -- Wife Loves Mark Sanchez ... On The Tattoo, Anyway

NY Jets head coach Rex Ryan just unveiled a bizarre tattoo that tells Mark Sanchez ... your QB job is 100% secure -- and also my wife totally digs you!

Sexy Rexy was spotted on the beach in the Bahamas with a tattoo on his right arm of a woman -- who looks a lot like Rex's wife Michelle Ryan -- wearing a #6 Jets jersey ... aka Mark's jersey.

After the Jets' horrendous season there's been talk that Sanchez could be traded ... so the ink could simply be a vote of confidence.

All fair questions ... considering Rex and Michelle's alleged fetish history.

We don't know if the tat is permanent, but it's worth nothing ... no Tim Tebow ink.

UPDATE: Upon further review the woman seems to be "Tebowing" (she also seems to be wearing no underwear). So ... mixed message?