Overachiever (noun)

A person who consistently performs or achieves at a level higher than what is expected or required.

Origin:

The word overachiever is a combination of the words "over" and "achiever" which means to exceed expectations or to do more than what is expected.

Examples:

1. She's always been an overachiever, excelling in academics and extracurricular activities.
2. The new employee was an overachiever, completing tasks ahead of schedule and always going above and beyond what was required.
3. He was considered an overachiever by his peers, constantly setting and achieving ambitious goals.
4. The term overachiever can also be used in a negative connotation, referring to someone who is always striving to be the best, but at the expense of their own well-being.
5. The team was filled with overachievers, who were constantly competing with each other to be the best.