The Collaborative International Dictionary
overenthusiastic \overenthusiastic\ adj. unduly enthusiastic.
Wiktionary
a. excessively enthusiastic
WordNet
adj. unduly enthusiastic
Usage examples of "overenthusiastic".
Belisarius knew that Maurice had reined in the overenthusiastic cataphracts.
She glanced at the brass terminal plaque that had been hacked into the woodwork by an overenthusiastic former resident.
Normally I encourage initiative in my people, and must therefore bear full responsibility for the results if they make mistakes, but in this case he was, well, overenthusiastic arid badly overstepped the mark.
There was a ripping sound, the sound of a turkey drumstick being torn from the cooked bird by an overenthusiastic child.
His face was slammed into the earth and he looked like an overenthusiastic Moslem determined to get in good with Allah.