Wiktionary
shot rock
n. (context curling English) The rock in the house closest to the button.
Usage examples of "shot rock".
Pomeroy and Elsie shot rock rabbits and roasted them, stuffed with herb-weeds.
That was not enough to ease his wrath, so he struck the rod hard upon the silver-shot rock at his feet.
The pockets bulging with gold-shot rock had been as much to blame for her lack of coordination as the cold.
And he had that night-cat-shot rock in the pit of his stomach, He looked at the blank faces and averted eyes of the SEAL'S around him and thought about Rita.