forever stamp
n.— «The “forever” stamp went on sale last week with an opening-day ceremony at the Liberty Bell in Philadelphia. The stamp, which carries an image of the Liberty Bell, sells for 41 cents and remains valid regardless of future rate increases.» —“Market wrap” The State (Columbia, South Carolina) Apr. 15, 2007. (source: Double-Tongued Dictionary)
Further reading
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Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...