Derived from artsy fartsy, this phrase is used to describe someone who created a piece of work deemed artsy-fartsy, and is being a bit too in-depth and knowledgeable (often full of bs) about it.
At an art opening:
Artist: ... and the black canvas represents my pain, much as Hieronymus Bosch used fantastic, demon-filled scenes to display a tragic view of human existence ...
Patron (whispering to friend): Dude, this chick is way too artsy-smartsy for her own good. I can't listen to this crap much longer.