Sometimes used in a sarcastic way to indicate someone who is not very beautiful at all.
I do not understand why I get hit on by gay men more often than straight women, since men are supposed to be the one driven by appearance... For those of you who are unaware, I am of an unconventional beauty.
by Oxymoronica December 04, 2006
someone who is not considered beautiful but looks pretty gorgeous in their own unique way
a person may not be very beautiful lookswise, but maybe very charming, she's referred to as an unconventional beauty
by dakssavasere November 27, 2010