LOL 😆 No, no fluffy sliders! I'm neither young nor trendy but I do like nice sandals.
When I say old ladyish sandals, I mean this style for example, often worn by some old women.
This is not ageism, it's nothing against anyone's choice of footwear just maybe a poor description of a particular style of sandals.
And as someone said above, this is style and beauty and the word frumpy totally belongs here!