gasbag

名词 gasbag:

1. a boring person who talks a great deal about uninteresting topics
   同义词：windbag
2. the bag containing the gas in a balloon
   同义词：envelope

gas.bag

n.（名词）
An expansible bag for holding gas.
气袋：一种可伸展的用来盛放气体的袋子
Slang One given to empty or boastful talk.
【俚语】 一个空洞的且喜欢自夸的人