what does stacey do with the coat uncle hammer gave him? why?

When Mama asks for Stacey's coat to shorten the sleeves, he has to admit that he has lent it to TJ until he grows into it. TJ was making fun of him, calling him preacher because of the way the coat fit. Mama wants him to get it back, but Uncle Hammer tells Stacey that if he is stupid enough to give his coat away, then TJ can keep it permanently; Stacey will not survive in the world if he lets people take things from him.