It's the Show Certificate of Merit, officially written as ShCM after the dog's name. It is awarded to a dog who has won 25 points at open shows. You get 1 point for BOB, 4 for a Group1, 3 for a group 2, 2 for a group 3, 1 for a group 4. You also get another point for BIS.
You don't have the same minimum entry requirements as you do with a JW, so it's rather easier to get.
Having said that, I've decided to make it harder for myself.....little Volk currently has 20 points, but he has ONLY won the BOB points under breed specialists, and actually more than half of the group points were from specialists too. Because I decided that I would do it that way be probably will never get the title, but it makes the points he has got all the more rewarding.

(And that's probably the last time you'll see me boasting about one of my dogs' show wins, but he's retiring from the ring this year and I felt he deserved it!)