1
general::
Phrase(s): all ears
Fig. listening eagerly and carefully. • Well, hurry up and tell me. I’m all ears.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Eager to hear something, listening attentively, as in Tell me who else was invited? I'm all ears. [Colloquial; late 1700s] Also see ALL EYES.
American Heritage Idioms