put out of one's misery

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put out of one's misery (third-person singular simple present puts out of one's misery, present participle putting out of one's misery, simple past and past participle put out of one's misery)

1. (transitive, idiomatic, informal) To submit a person or an animal to euthanasia.
2. (transitive, idiomatic, informal, figuratively) To end or destroy something for the good of the individuals involved in it.
   • 2011 October 23, Phil McNulty, “Man Utd 1 - 6 Man City”, in BBC Sport‎:

     And with some United supporters actually pleading with referee Clattenburg to put them out of their misery, one more moment of brilliance from the magical Silva found Dzeko surging into the area to finish left-footed for his second.

3. (transitive, idiomatic, informal) To provide somebody information which they have been expecting.

• euthanise (UK) / euthanize (US)
• shoot me