kinda like that, but more like for strangers, not so much nicknames for known people. like you see someone on the street and you want to get his attention so you shout out - hey, young/old/thin/fat/short/tall/pale/dark guy. or someone just bought some tortillas from you but you don't know their name and you don't feel formal, so you say thanks, young/old/thin/fat/short/tall/pale/dark guy.