Reverse slip stitch

I am starting a pattern that begins with a reverse slp stitch. It reads: Stitch Guide: Reverse Slip Stitch: (multiple of 2 stitches)

The pattern is knit by colored reverse slp stitch rows. The skirt is worked in rev St st with purl on the right side.

Please help with Rev slp st!

Does it give you instructions for that stitch? I suspect it involves slipping with the yarn either front or back, but I’m not sure.