boast about someone or something
and boast of someone or somethingto speak highly about someone or something that one is proud of. I just have to boast about my grandchildren. Do you mind? Is he boasting about his car again? I don't like to boast of what I did.
nothing to boast about
not worth bragging about; mediocre. In high school, my grades were acceptable, but they were nothing to boast about. Jill: Does this town have a good library? Nancy: It's nothing to boast about.