Jump on the bandwagon
join others in doing or supporting something fashionable or likely to be successful
a sight for sore eyes
to be glad to see someone
a white lie
a lie that is harmless to avoid being rude
a quick study
learns quickly, intelligent
keep up with the Joneses
people who feel it's important to show that they're as successful as others
bear the brunt
to suffer the main part or force
roller coaster
move, change, or occur in a dramatic manner/ to have ups and downs
under wraps
known to only a few people : secret.