bounce box
n.— «Her husband, Bob, brings her items from home when he hikes with her once a month, most recently her sturdier pair of broken-in hiking boots. He also mails her the freeze-dried food packages she assembled months ago. And she has what she calls a “bounce box” that she ships ahead to herself with items she only needs occasionally, such as waterproofing supplies or detailed trail maps for different states.» —“Taking a look inside a long-distance hiker’s backpack” by Debbi Snook Plain Dealer (Cleveland, Ohio) July 15, 2001. (source: Double-Tongued Dictionary)
Further reading
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If someone’s got melon, it means they’re smart. The expression most likely arose because of the resemblance between a melon and a human head. Several other foods are associated with having brains, including a cabbage, a gourd, and even a...