If you describe someone's attitude as sour grapes, you mean that they say something is worthless or undesirable because they want it themselves but cannot have it.
These accusations have been going on for some time now, but it is just sour grapes.
See full dictionary entry for grape
sour grapes
phrase
If you refer to someone's attitude as sour grapes, you mean that they say that something is worthless or undesirable because they wantit themselves but cannot have it.
[disapproval]
He should take recent criticisms seriously, not treat them as sour grapes.
See full dictionary entry for sour
sour grapes in British English
noun
(functioning as singular)
the attitude of affecting to despise something because one cannot or does not have it oneself
Word origin
from a fable by Aesop
sour grapes in American English
a scorning or belittling of something only because it cannot be had or done
Word origin
from Aesop's fable in which the fox, after futile efforts to reach some grapes, scornsthem as being sour
sour grapes
a situation where someone criticizes another person or accuses them of using unfair methods because they are jealous of their success
These accusations have been going on for some time now, but it is just sour grapes.