overenthusiastic

adjective

over·​en·​thu·​si·​as·​tic ˌō-vər-in-ˌthü-zē-ˈa-stik 

-en-,

 also  -ˌthyü-

: having or showing an excessive degree of enthusiasm : overly enthusiastic

… was minding his own business at a computer conference when an apparently overenthusiastic fan gave him a kind of bear hug around the neck, which wrenched some vertebrae …

—Ron Rosenbaum and Marissa Martinelli

Indeed, he thinks many in the press and business community may be a little overenthusiastic about how soon many of these new technologies will have an impact.

—Patricia Panchak

… he made an overenthusiastic lunge from the stage and tore cartilage in his knee.

—Judith Jacklin Belushi

overenthusiastically

ˌō-vər-in-ˌthü-zē-ˈa-sti-k(ə-)lē 

-en-

 also  -ˌthyü-

adverb

… I played it willingly, throwing myself into it overenthusiastically because I had few prospects and little choice.

—Evangeline Henry

Word History

First Known Use

1857, in the meaning defined above