Tomboy/ˈtɑːmbɔɪ/ Definition 1 of 2Pro Tip 1/3Gender Norms Refers to girls preferring activities or behaviors culturally associated with boys. She's always playing in the mud like a tomboy. Pro Tip 2/3Not Insulting Can be a neutral description without intending to offend or insult. My sister is quite the tomboy, always climbing trees and playing football. Pro Tip 3/3Not Gender Identity Being a tomboy doesn't imply anything about a girl's gender identity. Just because she's a tomboy doesn't mean she doesn't identify as a girl.