Knit slip pass is one stitch decrease. It's a counterpart for skp decrease. It leans to the right which makes it a great stitch for end of row decrease. It's a little bulkier than your typical k2tog. This texture can be embraced as a design feature.
To make this decrease knit 1 stitch, slip this stitch from right needle to the left needle, pass second stitch on the left needle over first stitch and off left needle, return stitch to right needle. This is a single right-leaning decrease.