A person with this chin is a practical type... I mean

He has a strong inclination for sports.

Many first-class athletes, military personnel and research experts have such a chin... even if the person is not in these positions, and loves sports very much.

Such a chin indicates that the person is...

He has energy and determination in times of distress. She/he can keep secrets and learn from success and failure.

Also without being destructive and vindictive like people with prominent angular jaw bones...he takes responsibilities in the family as well.