Definitions

1. noun

a person who talks or speaks excessively and often foolishly, especially about trivial matters

“The celebrity was accused of being a gasbag and talking too much about himself at the awards show.”

2. noun

a bag or container for storing or transporting gases

“The chemist used a gasbag to collect the mixture of gases for further analysis.”

3. verb

to talk excessively and often foolishly, especially about trivial matters

“The politician was accused of gasbagging about his past achievements during the debate.”