The "If you
hurt him/her I will break you" talk given as a warning to a romantic partner from a concerned
party, usually family or a close
friend.
Father of the bride: "I have a shovel and 30 acres of land. If you
hurt a hair on her head, no
one will ever find your body."
Groom: "You
don't need to give me a Shovel Talk, sir. I would rather die than hurt her."