From Longman Dictionary of Contemporary Englishhangdoghang‧dog /ˈhæŋdɒɡ $ -dɒːɡ/ adjective → hangdog expression/look
Examples from the Corpus
hangdog• Tortoni is a bald man with a hangdog face.• His hangdog gait belied his real attitude.• Ross was still sporting his hangdog look.• His hangdog mug is one of the most familiar on the music channel. 