hot air

(noun) meaningless talk to impress people

Example Sentences:

Man in Bar: How’s it going?
Girl in Bar: Not bad, and you?
Man in Bar: Good. Can I buy you a drink?
Girl in Bar: Sure.
Man in Bar: I’m very rich you know. I can buy you many drinks. Also I am very strong and can lift 150 kilos!
Girl in Bar: You are full of hot air!

When the professor told us how many books he had written, and how famous he was, we all thought he was full of hot air.

From the Blogs:

Houses of Parliament are full of hot air

Media:

Similar idioms:

1. full of oneself
2. get over oneself
3. bigheaded
4. cocky
5. up in the air
6. big-headed
7. walking on air
8. smug
9. get into hot water
10. hot under the collar
11. raise the bar
12. not playing with a full deck
13. hot
14. wingman