The term 'Scrawny MODEL' can be broken down into two words, 'WAIF' and 'MODEL'. WAIF is a 4-letter word meaning a very thin and undernourished person, often used to describe models in the fashion industry. A MODEL is someone who poses for photographs or other artwork, usually in the fashion industry. Therefore, a Scrawny MODEL is someone who poses for photographs or other artwork in the fashion industry while being very thin and undernourished.