agog (adv.)

"in a state of desire; in a state of imagination; heated with the notion of some enjoyment; longing" [Johnson], c. 1400, perhaps from Old French en gogues "in jest, good humor, joyfulness," from gogue "fun," which is of unknown origin.

Others are reading

Definitions of agog from WordNet

agog (adj.)
highly excited by eagerness, curiosity, etc.;
I've been agog all afternoon, waiting for the next episode in your mystery story