(characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position)
nowobogacki
synonim: parvenu
synonim: parvenue
synonim: upstart (a)

(a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class)
dorobkiewicz, nowobogacki, nuworysz, parweniusz, episjer
synonim: upstart
synonim: parvenu
synonim: arriviste