mutton dressed as lamb
US /ˈmʌt.ən drɛst æz læm/
UK /ˈmʌt.ən drɛst æz læm/

1.
老黄瓜刷绿漆, 装嫩
an older woman who tries to look younger by dressing in clothes designed for younger people
:
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Her outfit was a classic case of mutton dressed as lamb.
她的穿着是典型的老黄瓜刷绿漆。
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She's a lovely woman, but sometimes she looks like mutton dressed as lamb.
她是个可爱的女人,但有时看起来像老黄瓜刷绿漆。