Akin to the well-known Muffin Top, 'Milk Tops' are the mammary equivalent. They are often observed on women wearing an underfitting brassiere.
Milk Tops are commonplace in provincial France where they are flaunted by young women to attract the attention of men. Milk Tops have a characteristic 'wobble' depending on their age and size. They are known to be highly attractive to men, especially when seen on well endowed young waitresses.
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.