Definition of pack rat
1
: wood rat
especially
: a bushy-tailed rodent (Neotoma cinerea) of western North America that has well-developed cheek pouches and that hoards food and miscellaneous objects
2
: a person who collects or hoards especially unneeded items
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Merriam-Webster unabridged
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Time Traveler for pack rat
The first known use of pack rat was in 1885
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