yummy mummy
n.—Gloss: an attractive older woman. «“Please note not all our Aga owners are middle-aged women,” he says, indicating to some of the people at the party who are neatly dressed middle-aged men and a group of what are described in builders’ parlance as “yummy mummies.”» —“Gaga for Aga” by Richard Cornish The Age (Melbourne, Australia) Oct. 29, 2007. (source: Double-Tongued Dictionary)