Hands up if you like riding bikes, kicking balls, winning, being loud or impulsive or boastful or getting out the door before checking in the mirror?
As a start, that's what comes to mind when I hear 'tomboy'.
My homework is to research the term - to find out what it means to the wider world.
All I know is that I know I have an inner tomboy who has been quiet too long. How about you?