Flattery & Bragging

to treat someone in authority with high respect, particularly in order to get their approval

The sycophantic assistant would always bow and scrape whenever the boss entered the room, hoping to gain favor.

to get people to praise one, often by pretending not to be happy with oneself

Sarah knew she looked stunning in her new dress, so she subtly mentioned it to her friends, fishing for a compliment.

used to describe someone who never puts their word into action

In the end they seem to have been all mouth and no trousers.