Cholo (Spanish pronunciation: [ˈtʃolo]) is a loosely defined term that has had various meanings relating to the connotation of people of indigenous heritage, who in many cases have some Spanish blood (mestizos), or who have adopted elements of Spanish dress, language or culture. Its use has migrated from the initial negative ethnic designation as originated by Hispanic criollos in the 16th century. In sociological literature, it is one of castas, and refers to individuals of mixed or pure Native American ancestry, or other racially mixed origin (75% Indigenous and 25% European). The precise usage of "cholo" has varied widely in different times and places. In modern American usage, it most often applies to the low-rider sub-culture manner of dress.