A reduction of "bougie," Middle-Class Fancy describes behaviors and objects that indicate one's status as middle-class. Middle-Class Fancy carries a positive connotation and describes simple luxuries that everyday people might strive for.
"John's lawn is so green and well-manicured!"
"Yeah. Ever since his promotion, he's been middle-class fancy."
Although it may have earlier origins, first heard by most of the world on the infamous episode of <i>Seinfeld</i>, when George witnesses Elaine's atrocious dancing for the first time, and exclaimed, aghast, "Sweetfancy Moses!"