M theGM- Wrong. The Oxford English Dictionary has entries on flaunt, both sb and v.
I have extracted pieces of the entries, some of which are long.
Chambers, the little schoolboy dictionary, seems to be somewhat incomplete.
flaunt
sb 1. The action or habit of flaunting or making a display.
2. something used to make a show, showy dress, finery.
flaunt verb.
1. Of plumes or banners. To wave gaily or proudly, ....
2. Of persons. To walk or move about so as to display one's finery.....; to obtrude oneself boastfully, impudently or defiantly, .... of things, to be extravagantly gaudy, ....
3. trans. to display ostentatiously; to flourish, parade, show off.

So there, flaunt-a-flaunt! (yes, that is in Oxford as well).