It looks like you should slip 2 stitches, knit one, then pass the two slipped stitches over the knit stitch and off the needle. Just like a skp, but with 2 slipped stitches instead of one. Check out the video for SKP in “abbreviations explained” up top.
I may be wrong though. Is there a description of it on your pattern?
Sounds to me like if you slip 2 as if to k2tog, that will TWIST those two sts around each other…if you slip 2 sts one at a time, it will only twist the individual sts.
SO, stick your right needle into 2 sts like you were going to knit them together (in other words, from the left side), but DONT. Just slip them to the right needle.
Then, knit one st regularly
Then, pull the 2 slipped sts OVER the regularly-knitted one.
I think the addition of “drop from the needle” is a little redundant, as one does this ANYWAY when passing sts over, dont they? What else would one DO with a passed-over st?
I agree. It’s redundant. But we all know pattern writers aren’t always on the same plain as the rest of us. lol
Although… I suppose you could pass a stitch over another an leave it on the needle to create a little X when you knit the next row… maybe? I’ve never seen it done, but there’s a lot I haven’t seen.