Synonyms for Sheepish (same or very similar meaning)
WordNet sense 1 (like or suggestive of a sheep in docility or stupidity or meekness or timidity):
sheeplikeWordNet sense 2 (willing to be taught or led or supervised or directed):
docileWordNet sense 3 (showing a sense of shame):
shamefacedWordNet sense 4 (feeling shame or guilt or embarrassment or remorse):
ashamedFrom the ODE community, based on WordNetadd/edit