"young girl," U.S. slang, c.2002, from American Spanish chica "girl," fem. of chico "boy," noun use of adjective meaning "small" (here used as an affectionate term of address), from Latin ciccum, literally "chick-pea," figurative of an object of little value (cf. Old French chiche).
Examples from the Web for chica
It is about time for me to think of finding a husband for you Chica.
"Go and walk in the garden, Chica," said Don Alfonso, interrupting him.
Thenceforward Tom, whom the Chica loved, was the Caïd's only friend.
"Come in, chica" (girl), said her mistress, making a sign for her to approach.
Give Estevan a chair, chica, and then go; I do not want you any longer.