"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
This was washed down with ‘chica,’ and afterwards the padre and I indulged in a cigarette and a chat.The Hunters' Feast|Mayne Reid
"I am not pretty Chica, and I am not little," she cried angrily.The Firebrand|S. R. Crockett
When we return, we cannot sleep, but must grind maize all night for their chica.The College, the Market, and the Court|Caroline H. Dall
"Come in, chica" (girl), said her mistress, making a sign for her to approach.The Bee Hunters|Gustave Aimard
"You have had a visitor this morning, Chica," said Don Alfonso, in a more natural tone than she had heard him speak in for weeks.Ponce de Leon|William Pilling