Bost Up -

To join, take the last stitch you worked (the edging stitch) and pass it over the newly picked-up stitch to securely connect a new section (like a border or sleeve) to the main piece.

If you can share the rest of the line (e.g., "BO 2 sts, k3..."), I can tell you exactly what that row is supposed to do. Baby Knits From Around The World | PDF - Scribd bost up

Insert your needle into the edge of the sweater (often in the gap between stitches), wrap the yarn, and pull it through to create a new stitch. To join, take the last stitch you worked

Based on the search results, "bo st up" appears to be a knit stitch abbreviation or a fragment of a knitting pattern, specifically a "Baby Knits from Around the World" pattern involving "BO" (Bind Off) and "st" (stitch) or "pick up" a stitch. "BO" (Bind Off) and "Pick Up" Guide Based on the search results, "bo st up"