Shot With A Shovel Meaning

(Ireland) severly admonished, castigated.

Example: 1872 Sarah Johnson Cogswell Whittlesey Bertha the beauty, A story of the southern revolution
  I don't approve of petticoat government, as a general thing, but I'll be shot with a shovel if it ain't necessary with fellows like Stanhope.
2009. Cathy Kelly. What She Wants.
  I'll kill him for leaving you here all on your own. He should be shot with a shovel for thinking it's right to go off and leave you ...
2010, Tony Smith, Lenovo intros ThinkPad X201 series, www.theregister.co.uk
  Ditto about the red rot thing. The blue Enter key looks Fisher Price, too. Anyone who disagrees should be shot with a shovel