act smart (spoken)

showing off (spoken)

act and think powerful (spoken)

slander

(literary) false rhetoric

to flaunt one's prosperity

act and think highly of oneself; showing off (spoken)

arrogant; to feel smug with oneself; to get a swelled head

to fake courtesy

act decent (spoken)

To pretend to be hard working on purpose

arrogant; to act cocky

act and think highly in value of oneself; showing off valuables (spoken)

to pretend to be well-acquainted with someone

to think of oneself as very capable or skilled; to consider oneself to be "all that"

to be conceited and domineering

to pretend to be generous

to pretend to be an expert