(名詞) 行為動作比實際年齡來得年輕的人。
downaging (動名詞/現在分詞):行為動作比實際年齡來得年輕。

The first type of consumer is the Downager, who is Generation Y in attitude but not in age. "You often hear that young people are the early adopters of technology but actually the study shows that the baby boomers spend more on technology than any other generation,' Mr McCrindle said. "They're using the technology, they're connecting, they're social networking and they're texting their kids."
—Rodney Chester, "Reading between the lines," The Courier Mail, February 12, 2010

Experts have coined the term "downagers" — which they say reflects the growing "act younger, live younger" attitude of the over-60s — and believe it applies to more than 100,000 Australians.
—Callie Watson, "Over-60s celebrate 'act-younger, live younger' attitude," The Advertiser, February 1, 2010