pompous
POM-pusadjMeaning self-important and showy in speech or manner
Memory hook POMP-OUS: puffed up with POMP. The duke arrives with a drumroll, a velvet cape and a speech all about how wonderful he is. He is pompous.
The pompous duke gave a twenty-minute speech about himself at the ribbon cutting.
In context Instead of simply saying the bus was late, the pompous official announced that “transit services are experiencing a temporary scheduling irregularity.”
Similar self-important, puffed-up, pretentious, arrogant
Opposite modest, unpretentious, down-to-earth
From Late Latin pomposus, from pompa, “a procession, a grand display.”