How can I translate the expression "sour grapes" into Italian?

Question

From the Oxford dictionary:

sour grapes

used to refer to an attitude in which someone adopts a negative attitude to something because they cannot have it themselves:

government officials dismissed many of the complaints as sour grapes

Is there an equivalent or similar expression in Italian?

This question has been already asked on Spanish Language & Usage and, according to the related answers, it seems that in that language the word is envidia, but I'm not sure that in Italian is the same. Rather, I think that one of the candidate words is spazzatura.

Answer 1

Invidia (envy, a feeling of discontented or resentful longing aroused by someone else’s possessions, qualities, or luck, ) might be the word you are looking for.

From Vocabolario Treccani

invìdia s. f. [dal lat. invidia, der. di invĭdus: v. invido]. –

1. Sentimento spiacevole che si prova per un bene o una qualità altrui che si vorrebbero per sé, accompagnato spesso da avversione e rancore per colui che invece possiede tale bene o qualità;

Invidia mignt cover also the case where the possession/quality does not belong to anyone specific like in "The Fox and the Grapes" fable.

For your particular case, the complaints might be "mossi/dettati dall'invidia"

Answer 2

Un termine consueto soprattutto a Roma e nel Lazio, e senza sinonimi. Il "rosicone". Invidioso, con rabbia e senza pace.

Answer 3

I heard many times the expression "verde d'invidia", which would mean something like "green because of envy".