pompous
adjective /ˈpɒmpəs/
  /ˈpɑːmpəs/
(disapproving)- showing that you think you are more important than other people, especially by using long and formal words synonym pretentious
- a pompous official
 - His speech sounded very pompous and self-congratulatory.
 
Extra Examples- It was a good letter, if a little pompous.
 - She found him pompous and annoying.
 - I can't stand pompous people.
 
Oxford Collocations DictionaryPompous is used with these nouns:- jerk
 
Word Originlate Middle English: from Old French pompeux ‘full of grandeur’, from late Latin pomposus, from pompa ‘pomp’.