What it means to be a "self-confessed tomboy" is a situation where a girl acts like a boy.
Based on the fact that this information was revealed in a biography, we can infer that the writer is a "self-confessed tomboy" and thus behaved in some ways like a boy, although she was a girl.
What is a Biography?
This refers to the written literature that contains the details of a person's life, as written by the person.
Hence, we can see that based on the given question, we can note that what it means to be a "self-confessed tomboy" is a situation where a girl acts like a boy.
Read more about biographies here:
https://brainly.com/question/26447560
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