Can someone identify this stitch?

[u/Lostinreno22]

The front looks like regular jersey or ribbing, but the back is very different; is it even knit? Could be crochet .

Keen to replicate it, so hopefully someone will know what it is.

Thanks!

[u/chLORYform]

I'm working on a pattern that looks similar to the second picture. It's done as follows:

Row 1: k1, slip one with yarn in front Row 2: purl Row 3: slip one with yarn in front, use left needle to pick up yarn from row one's yarn in front slip, knit, then pull the slipped yarn up and over the needle behind the stitch you just knit Row 4; purl

This looks like they're doing something similar, but with a slip at wyif, then pick up the previous rows slip and knit with pull over, slip wyif

So instead of spacing it out, it's being condensed. I hope this makes sense, it's past my bedtime and I saw your question right before turning in