"Ostentatious display" refers to showing off or flaunting something in a very obvious, exaggerated, and noticeable way. It means displaying wealth, beauty, or possessions in a showy and attention-seeking manner. Full definition
Set in Edwardian London and on the stormy coasts of Cornwall, Cape Cod, and Nova Scotia, Thunderstruck evokes the dynamism of those years when great shipping companies competed to build the biggest, fastest ocean liners, scientific advances dazzled the public with visions of a world transformed, and the rich outdid one another with ostentatious displays of wealth. (bookbrowse.com)
The wines of arguably the world's most famous wine region have long installed themselves as the default setting for those looking for ostentatious displays of wealth and success. (afr.com)
I was embarrassed and tried to explain that we aren't all like that, and NASCAR goes out of its way to exhibit ostentatious displays of military patriotism, and tie that to their car race. (religion.blogs.cnn.com)