Highfalutin (adjective)

1. Having or showing an exaggerated sense of one's own importance; arrogant.
2. Having or using an affected, grandiose style of speech or writing.

Origin:

From high meaning elevated and fluting meaning flattery, referring to elevated, grandiose language or behavior.

Examples:

1. He had a tendency to get carried away with his highfalutin ideas.
2. The highfalutin politicians were out of touch with the everyday concerns of the people.
3. She thought the highfalutin words used in the report were too pompous.
4. His highfalutin mannerisms made him appear insincere.
5. The highfalutin fashion show was filled with pretentious attendees.