Rocko is an eager- beaver when it comes to collecting money for Mr. Big.The eager-beavers were trying to buy tickets yesterday!
eager beaver
One who is industrious and enthusiastic (perhaps annoyingly so). Give that big project to the new girl, she's a real eager beaver.Aren't you an eager beaver, getting to the office an hour early.
eager-beaver
n. a person who is very eager to do something. Rocko is an eager-beaver when it comes to collecting money for Mr. Big.