If you describe someone as bombastic, you are criticizing them for trying to impress other people by saying things that sound impressive but have little meaning.
例句
He was vain and bombastic.他自负虚荣,大话连篇。...the bombastic style adopted by his predecessor.他的前任夸夸其谈的作风
英汉词典释义
adj.
夸夸其谈的,空洞的
The candidate spoke in a bombastic way of all that he would do if elected.候选人大肆吹嘘, 一旦他当选将要如何如何。
英英词典释义
Adjective
1. ostentatiously lofty in style;
"a man given to large talk""tumid political prose"