heartstick
n.— «Some pounds throw both dogs and cats in together for gassing. Other pounds use a method called heartstick where a lethal dose of medication is injected into the heart. Unfortunately, it is often not done correctly!» —“Never buy a dog from any breeder” by Margaret Cloud Stories In The News (Ketchikan, Alaska) Mar. 21, 2007. (source: Double-Tongued Dictionary)
Further reading
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The words tough, through, and dough all end in O-U-G-H. So why don’t they rhyme? A lively new book addresses the many quirks of English by explaining the history of words and phrases. And: have you ever been in a situation where a group makes...