Cholos = tatooed homies. IIRC there's about 20 yrs that separate pachukos from cholos....but they're basically da same ting.
...its been quite a while. In the lat 15-20 years the most common slang for a street dude of Mescan descent is cholo. Which can have a number of diff meanings...lol. Not all of them are complimentary depending on if you're in so cali or in so Texas.