beat one's gums

例句：

1. 1. She beat her own gums about how great she was.
   她吹嘘自己有多好。
2. 2. He often beat his own gums when he talks to people.
   他经常在和别人说话时吹嘘自己。
3. 3. The salesman beat his own gums about the new product.
   销售员吹嘘新产品。