It took all my resolve not to run after said group of girls and ask the one (with a roll up on the go) who'd uttered the words exactly what she was referring to. Was it clothes, music, dalliances with younger men - what could it be!
I tried to put myself in their shoes and all I could think was that when I was 17 I thought 30 was old!. In the late 80s the American programme Thirty Something seemed an alien concept.

I really wish I knew. I would love to know the disparaging thoughts of youth. In the absence of the definitive words lets all have a go at finishing the sentence
'It is so annoying , I hate it when women in their 30s and 40s ....'
I'll make a start '...try and copy Alexa Chung's style'