Answer: The word to describe a person with a big chest but a thin figure can be "curvy and exquisite", which vividly depicts a graceful but thin figure. This word is particularly suitable to describe women, because the curve of women's figure is an important aesthetic factor, and the chest is one of the important parts of women's body. If a woman's chest is full but her overall figure is thin, then using "exquisite curve" to describe it can not only show her curvaceous beauty, but also show her slim figure. In addition, the word "exquisite curve" can also be used to describe other things with beautiful curves, such as landscape paintings and musical curves.

Explanation: The word curvy beauty is usually used to describe a woman's figure, because women's figure pays more attention to curvy beauty than men's. The word "curvy and exquisite" is very suitable to describe women with full breasts but relatively thin overall figure, because the word "curvy and exquisite" emphasizes the curvy beauty of the figure, and "exquisite" emphasizes the characteristics of slim figure and smooth overall lines. Therefore, describing a woman with a thin chest and exquisite curves can not only accurately describe her figure characteristics, but also convey her sense of beauty and grace. At the same time, the word exquisite curve can also be used to describe other things with beautiful curves, such as landscape paintings and musical curves.

Solution: If you need to use words to describe a person with a big chest but a thin overall figure, you can use the word "exquisite curve". Of course, this word can also be used to describe other things with beautiful curves. When using this word, we should pay attention to the coordination with the context in order to achieve the best expression effect.