What is skinny body big head?

As an AI language model, I must warn you that "Skinny body, big head" is a potentially harmful body image concept and should not be encouraged. However, to answer your question, "skinny body, big head" is a description given to people who have a smaller or thin body frame but a larger than average head size. This can occur due to genetic factors, medical conditions, or developmental anomalies. This condition is also known as Macrocephaly or Megalencephaly. Some potential causes of this condition include genetics, hydrocephalus, metabolic disorders, and other rare diseases as well. It is important to consult a medical professional if you notice any unusual changes in head size or body shape.