Being skinny is when you are very lean or thin, and emaciated. This is mostly as a result of a poor diet, bad lifestyle choices, or is hereditary. Some people tend to think they are skinny because they have others that are relatively heavier than those they are around. In most cases, this is not the case. There is actually a standard for measuring skinniness. With BMI, being skinny can be related to being underweight.
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