Slanted puff stitch is a one of the basic crochet stitches.
At all crochet schemes slanted puff stitch symbol would appear as:
At the scheme below you can see a stitches of slanted puff stitch.
Slanted puff stitch instructions
Work one single crochet inserting your hook in the first chain.
Chain two stitches, yarn over and pull up the loop, insert the hook into the same chain, yarn over and pull up the second loop, insert the hook into the same chain, yarn over and pull up the third loop.
Catch the yarn and draw it through all loops on your hook.
Chain two stitches. Repeat the preceding steps skipping every two chains of the previous row.
Save this step by step tutorial as a reminder