What do you mean by big fish farmers with dried radish? Is it a derogatory term or a commendatory term? Is this a compliment or a joke?

Going out for dinner with classmates, one classmate said in an ostentatious manner that his sister-in-law showed her thighs, hugged him, held his hand and kissed him all day. What's more, she changed her clothes in front of him as if nothing had happened. We all thought he was bragging. I went to his house on a business trip to see if his sister-in-law was really like what he said!

Sure enough, he didn't lie to us. I was shocked! Her sister-in-law is five years old!