Things that are meant to help a person become thinner or lose weight.
Slimmings are usually seen as positive because they can help people become healthier.
Examples:
She bought some new slimmings to help her lose weight.
I need to get some slimmings to help me be healthier.
The store sells a lot of different slimmings to help people lose weight.
He thinks the slimmings will help him look like a movie star.
She has so many slimmings, she could open a store!
The slimmings made her feel like a new person.