mutton dressed as lamb

Translations
баранина, одетая как ягненок
She was trying to look younger, but it was just mutton dressed as lamb.
Она пыталась выглядеть моложе, но это была просто баранина, одетая как ягненок.
Definitions
A phrase used to describe an older person who is trying to appear younger by dressing in a style that is more appropriate for a younger individual, often resulting in a humorous or unflattering effect.
Words
mutton

noun
баранина
dressed

adjective
одетая
as

preposition
как
lamb

noun
ягненок