Small sculptures and wall pastings made from snot.
In the mens bathroom stall I saw booger art depicting a smiley face.
As seen in public bathrooms; the vast array of old, crusty dried snots that scumbags have wiped on the walls above urinals and/or inside stalls... sometimes resembling modern art.
When I was taking a dump the other day I picked a nice bloody one... I'm glad I was able to contribute to the booger art on the wall- which is starting to resemble a Picasso.