A tomboy is a girl who dresses and sometimes behaves the way boys are expected to, often into more masculine things like "stronger" sports, computers, or cars.
Stereotypical wears jeans, baseball caps, and denim vests/jackets.

types of tomboys

. the classic Tomboy
The Classic Tomboy exhibits a taste for red-lipstick, white shirts, khaki pants and the occasional riding breeches. This tomboy enjoys simplicity, afternoons on a horse and evenings spent pursuing other specialty hobbies before capping it all off with more reading, smart television or some other intellectual pursuit. She loves the outdoors, is opinionated and knows her classics, whether its music, art or literature and like most tomboys, is an all or nothing person. She can compromise but not on things she is utterly passionate about and can be very spontaneous, so watch out!

.The androgynous tomboy
The Androgynous Tomboy has been around for the longest time. She appears as great and ostracised leaders and warrriors of history (Joan of Arc), pageboys in Shakespeare’s plays, space-travelling David Bowie-sque astro-glam mods and in top-rated Korean romance dramas. The androgynous tomboy has no interest in being in the trenches of gender wars. Her look, style and attitude is really what every tomboy aspires to because she is the one who straddles sexual ambiguity so effortlessly without all the rigidity and expectations associated with gender stereotypes. Modern-day androgynous female icons include Tilda Swinton, Coco Chanel, Grace Jones, Shannon Funchess and Annie Lennox.

.the hip hop tomboy
The Hip-Hop Tomboy was a staple back with 90s female rap acts like Salt n Pepa, TLC and Missy Elliot. Essential to the look were oversized clothing. From baseball caps and tees, low-hung, reversed men’s pants, gold accessories and hi-tops so prevalent with male rap acts, the hip-hop tomboy came with serious attitude and an image that could either scream ‘Screw You!’ or ‘Cute’. This tomboy enjoys rap and hip-hop music, gaming, comics, tech and software, has a cool swagger, loves limited edition sportswear and gear and usually is very into urban sports like parkour, skateboarding, basketball, football and even the occasional chance to show off their B-Boy dancing skills. Modern day icons include, M.I.A, Global Icon, Santigold, Gwen Stefani and Rita Ora

.the rock/goth tomboy
While I don the classic tomboy look most of the time, you are really a rock/goth chick tomboy inside. You enjoy wearing black tees, listening to industrial, new-wave and rock music. The only reason why you don’t pull that look off most of the time is that it’s not practical in the hot tropics where you currently live in. Besides that, it requires much accessorizing, makeup and hairstyling. It also requires quite a lot of layering, gelling and ‘eye-lining’. Great stuff for cold temperatures but in this heat? Forget it! The rock/goth tomboy typically can spend their days writing dark poetry, living on the edge or enjoying experimental art, music and books. They also find great joy in checking out cool fashion, dive bars and clubs with great bands as well as spending time gaming. More likely, they also play in a band, own a expensive motorbike or sports car, if they can afford it and are very cool under pressure. Icons include Debby Harry, Joan Jett, Ladyhawke, Siobhan Fahey, Chrissie Hynde, Nina Hagen and Siouxie Sioux.

Which one of them don't see their periods?

Aren't we all just a mix?