He was very enthusiastic about the idea of moving to Spain.
raring to
I've bought all the paint and I'm raring to get started on the decorating.
jump at
She jumped at the chance of a trip to Paris.
Go to the thesaurus article about these synonyms and antonyms of be dying for/to do.
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If you are eager to do or have something, you want very much to do to or have it because you find it interesting or exciting.