He's such a blowhard, always talking about himself.
windbag
Frequency:
75
%
She's such a windbag, always going on and on.
braggart
Frequency:
70
%
Don't listen to him, he's just a braggart.
loudmouth
Frequency:
65
%
He's a loudmouth who never stops talking.
gasbag
Frequency:
60
%
Ignore that gasbag, he's full of hot air.
Idiomatic Expressions for windbag
Phrase: gasbag
Meaning: a person who talks excessively or at length, especially about trivial matters
Usage: I can't stand listening to that gasbag go on and on about his new car.