Gasbag and Hotshot

Gasbag noun - A person who talks constantly.

Hotshot and gasbag are semantically related in braggart topic. In some cases you can use "Hotshot" instead a noun "Gasbag", when it comes to topics like person who talks boastingly.

Hotshot noun - A person with a high level of knowledge or skill in a field.

Gasbag and hotshot are semantically related in braggart topic. Sometimes you can use "Gasbag" instead a noun "Hotshot", if it concerns topics such as person who talks boastingly.