ostentatious

/ˌä-stən-ˈtā-shəs/

{et_link|ostentati(on)|ostentation} + -ouscontention : contentious

adjective

  1. attracting or seeking to attract attention, admiration, or envy often by gaudiness or obviousness : overly elaborate or conspicuous : characterized by, fond of, or evincing ostentation

an ostentatious display of wealth/knowledge

showy pretentious ostentatious mean given to excessive outward display. showy implies an imposing or striking appearance but usually suggests cheapness or poor taste. pretentious implies an appearance of importance not justified by the thing's value or the person's standing.