Rob Kardashian & Blac Chyna Reveal Cryptic Ink

Rob Kardashian and Blac Chyna are playing mind games with us now.

Blac released a Snapchat vid Thursday revealing Rob's new neck tattoo. It appears to spell Anjila ... Blac's real name -- Angela -- in Arabic.

It's a guessing game, really ... cause it could also spell Aniyla ... reportedly their unborn baby's name.

We'll keep digging.