It might be aid that he is portrayed as a lazy person not only physically but morally. His heart was broken because he did not marry his true loved. So he became cynical, he did not care the state of his soul. he could not stop eating meat. He might be considered a "Byronic " hero, he was against slavery and materialism.
Augustus St. Clare from Uncle Tom's Cabin is a handsome young man with large blue eyes and golden-brown hair as described in the novel. However, his elegant physical expressions are not compatible with his personality. St.Clare doesn't attain the same characteristics in his personality. He is lazy, laid-back an indulgent. His laid-back attitude prevents him to see the right from wrong as he doesn't want to understand and doesn't want to accept that the slavery is wrong. But he can also be someone different in serious matters and can put his passion into this as the description of his character shows.