A pretty Tunisian Stitch that creates a biased fabric. Also known as Full stitch, Waffle stitch or Gobelin stitch (see video below).
If you would like to use this stitch to create a square fabric, skip the first space and work the 2nd space on alternate rows. On rows where you work the 2nd space first, work the last space as well. On rows where you work the first space first, skip the last space of the row.