Eager beaver
Meaning: a person who is very excited and enthusiastic about pursuing some activity, a person who is willing to work very hard
Example: He’s a real eager beaver about jogging. Dieting must be done slowly and carefully. Don’t be such an eager beaver to lose weight that you harm yourself by not eating anything.
Example: He’s a real eager beaver about jogging. Dieting must be done slowly and carefully. Don’t be such an eager beaver to lose weight that you harm yourself by not eating anything.