The act of painting a Van Gogh style image with your dick on your partners back and ass after a thorough/ rough ass fucking. Using a nice mix of cum, lube, shit, and possibly blood.
Last night I did a Dirty Art on Rachel it was Sunflowers in a Vase and frankly was almost to beautiful to wash off.
When you do a woman in the ass so hard that your penis comes out the woman's mouth like a shish kebab
I was boning this chick so hard in the ass last night that I accidentally dirty art kabob her