Word used in the Hispanic Caribbean (Puerto Rico, Dominican Republic, Cuba) to denote a person who is of mixed Black and White ancestry but who has white skin and African features either in curly or kinky hair, a wide nose, or full lips. In the US they'd likely be high-yellow, but in the Caribbean they have their own grouping. It is a descriptor. The feminine equivalent is jabaa.
"¿Quién es el chaco jabao de Santurce?"
"Ese es VÃctor Soriano"
Translation:
"Who's the jabao guy from Santurce?"
"That's Victor Soriano"