[annalex]

The explanation of what he meant by the idiom “so I ate up every word he said” is what he gave to the disciples.

No, because if the meaning was idiomatic, no commotion over it would have ensued, and the Last Supper would not have repeated the essential of giving His body and blood to eat linking it to the Passion.

[Petronski]

I’d love to see evidence that such an idiom was used in the place and time Christ walked the earth.