cobble stomp
Sexualised placement of one or more feet into a cobbler, usually peach. Often clothed in a single sock the stomper will move the foot about attempting to get the more fluid material to pass up and between the toes. The cobble soiled socks fetch a premium from the right wearer.
That Onizuka chap offered to pay me handsomely for some basic cobble stomp photos, dude didn't even want me to cry during it.