If I knew exactly when he gave that expression I could tell you whether he was disgusted with himself for what he did or disgusted with the media at a particular question or bringing his behavior to light. The wrinkled upraised chin and tight lips show a suppression of fear and also of anger.
Patti Wood, MA, Certified Speaking Professional - The Body Language Expert. For more body language insights go to her website at http://pattiwood.net/. Also check out the body language quiz on her YouTube Channel at http://youtube.com/user/bodylanguageexpert.