I'm not sure that was a nice thing to say

We were out on our evening walk tonight and met one of the little old neighbor ladies walking her big black lab. I wanted to play and so did she, but we only had time for a brief sniff. Lexie was all bristly and uncooperative, as usual. The lady chatted a bit with Mom and said cute things about us. Then she said that when she was growing up, her uncle had a schnauzer named Tish. She had asked him, "What's with the name Tish?" He told her it was something else when roughly spelled backwards. All the humans laughed. Then Mom said I was full of whatever backwards tish is. I don't get it.
We walked on and I did my duty. Mom said I wasn't full anymore. I think she's having fun at my expense somehow.