"假小子 (jiǎ xiǎo zi, tomboy)" is a young woman whose social behaviour is similar to that of male adolescents or young men. "假小子" behaves in a confident and noisy way, who drinks alcohol and may enjoy sports or other activities that are traditionally enjoyed by men.
Analysts believe the ladette phenomenon has been driven by increasing levels of financial independence among young women.
She has also had a reputation as a hard-drinking, hard-partying ladette who seems to enjoy the single life.
My twin sister grew up with the reputation of being the tomboy of the family, the sporty one who participated in soccer and other organized sports.
That girl insists on playing only with boys and gets a boy's haircut.