highfalutin

high|fa|lu|tin /h'aɪfəl'uːtɪn/
[ADJ]
People sometimes use highfalutin to describe something that they think is being made to sound complicated or important in order to impress people. (INFORMAL, OLD-FASHIONED)
This isn't highfalutin art-about-art. It's marvellous and adventurous stuff.
= pretentious