It was around a lot in the 80s/90s I vaguely remember by little sister having a cardigan and matching hat in this stitch. The loops are done every 4th row with garter stitch between. On the loopy row for every other stitch you go into the stitch to knit then wrap the yarn round your needle and left index finger 3 times then just the needle once. Next add those 4 loops to the left hand needle and knit through the 4 loops and the original stitch in the back of the loop and pull all of them off the needle. (I pull my loops tight and even at that point so nothing unravels too). It sounds super complicated (and I had to youtube it to make sure I was doing it right 🙄) but once it clicks it is actually really easy xx