A lowering of oneself; loss of rank
Disappointment is defined as a feeling of sadness, dissatisfaction or displeasure when something isn't as you planned.
Anything that discredits
Find another word for sour-grapes. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for sour-grapes, like: bad-mouthing, derogation, disappointment and disparagement.