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.
Person 1: Whats up dawg?
Person 2: just chillin, about to pop open a Corona.
The term "homie" was started by Mexican-Americans, most commonly in East Los Angeles, though, of course, the credit givin for the term goes out mostly to African-Americans. The term derrives from Homeboy, and was shortened down to just "Homes" or sometimes spelled "holmes", which is another Mexican-American term, commonly used in California. Rapper Biggy Smalls has used the term homes/Holmes commonly.
Person 1: Whats happenning homie
Person 1: just chilling homes.
The term "homeboy" derrives from "homie", and each of those terms have been shortened down overtime as "homes", or sometimes spelled "holmes". The term was started by Mexican-Americans living in the barrios of Los Angeles, most commonly said in East Los Angeles. The term refers to friends/companions living in the same neigborhood as eachother. Which is why "HOME" is started before boy, thus creating "homeboy".
Person 1: Aye whats happening homeboy?
Person 2: nothing just chilling, you?
Person 1: about to go to Rob's house...
Person 2: who that? is he a homeboy?
Person 1: Nah... just some foo i kick it with from Grape Street.