Dawg is a term to identify someone you would usually hang out with. Same for homie, homeboy, and homes/
holmes. The term Dawg was started in
Mexican American communities, but most of the urban terms like dawg, homie, homeboy, etc. are usually givin credit for to the black/African-American community. The term dawg was originally and most commonly used in Spanish, wich is
Perro. But the Mexican Americans later started using it in English, dawg/dog.