Kylie Jenner -- My Blac Chyna Shade Game Is Still Strong (PHOTOS)

Kylie Jenner must follow Blac Chyna's Instagram page like a hawk ... because she once again mimicked her boyfriend's baby mama ... with a catty caption and all.

BC posted the innocuous selfie ... and KJ posted her own just two hours later, in similar getup, with the simple caption, "Snap."

Kylie pulled the same stunt a few months back when Blac Chyna posted a photo of a watch ... and Kylie snapped a pic of her same watch and captioned it, "Currently."