Wiktionary
alt. (context idiomatic derogatory English) A middle-aged or elderly woman dressed in a style more suited to a young woman, especially if in a deliberate attempt to appear young. n. (context idiomatic derogatory English) A middle-aged or elderly woman dressed in a style more suited to a young woman, especially if in a deliberate attempt to appear young.
Usage examples of "mutton dressed as lamb".
Beside all the utterly ravishing girls in their T-shirts, leggings or occasional micro-skirt, she felt like boiled mutton dressed as lamb without even the aid of caper sauce.
Marianne Mote was one of the finest bits of mutton dressed as lamb that Ryan had ever seen.
Youthful excess is one thing, said the Dean, but mutton dressed as lamb is another.
It would be like an old woman putting on her war-paint: she'd still come out mutton dressed as lamb.