A girly girl is a girl who likes things that are traditionally associated with girls like dresses, skirts, and sparkly things. She might like to play with dolls, do her hair and put on makeup. She might also like to sing and dance or do other activities that are considered feminine. Basically, a girly girl is someone who likes to express her feminine side in her appearance and interests. It's important to remember that everyone can like whatever they want, regardless of whether it's considered traditionally "girly" or "boyish."