(Australia, colloquial, informal) A portable defibrillator.
2006, Taking heart, The Bulletin, Issues 6502-6509, [http://books.google.com.au/books?id=hR0YAQAAIAAJ&q=%22Packer+whacker%22|%22Packer+whackers%22+-intitle:%22%22+-inauthor:%22%22&dq=%22Packer+whacker%22|%22Packer+whackers%22+-intitle:%2…
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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