Is Gasbag One Word?

a bag for holding gas, as in a balloon or dirigible. Slang. a talkative, boastful person; windbag.

What is gasbag?

1 : a bag for holding gas. 2 informal : an idle or garrulous talker.

Where does the phrase gasbag come from?

Gas bag, as a noun meaning someone full of hot air, or inclined to make a lot of empty talk, was common by the middle of the 19th century. Balloons were well known by then, although not so much so as in the next century.