What is Over My Dead Body?
1.
This phrase is a verbal objection to a proposed action, claiming that the author/speaker is willing to fight with every ounce of their life to prevent the action.
You want to take my kids away from me? Over my dead body!
*whips out a shotgun*
See
2.
you won't be able to do it if I am alive to prevent you
Your going to give in to peer pressure? Over my dead body.
See