A feces stain in the center of your palm resulting from a toilet tissue malfunction (ie, when you wipe your butt, the toilet paper tears, and you end up with a stain in the center of your palm).
Alternate definition: When you wipe and discover an image of Jesus on your toilet paper.
Your friend is getting sweet revenge on you for embarrassing him in front of his girlfriend so, he farts on your pillow. You have a great night's sleep, but low and behold you wake up with extremely contagious, raw goopey eyes. bam... you just contracted a stinkmatism.