Originally Posted by
owbjhx
You translated it fine.
Duan Yu's exposed bottom is a running joke from Chapter 3 to Chapter 6 of 'Tian Long Ba Bu'. It refers to the incident in Chapter 3 when Mu Wanqing dragged him along behind her horse, which tore up his clothing. About halfway through that chapter, DY manages to escape from her, and then sits down at an inn for some food: "There were a few big holes in the seat of his pants. As his buttocks pressed against the surface of the bench, he felt a chill." Immediately after this, Jinyong drops one of the first hints about DY's background: "His life had been all splendid clothes and pristine food; today, he was bare-bottomed and eating coarse victuals..."