“Chino” meaning curly-haired has nothing to do with being Chinese. It comes from a Nahuatl word meaning curly-haired and is not found as such outside of Mexico.

“Gringo” comes from “hablar en griego” (speaking Greek), a foreigner whose speech is unintelligible. Its use can be traced back to Spain. The “green-go” etymology is false at the very least because soldiers in the days of the U.S. Intervention (”Mexican-American War” to you gringos) wore blue.

“Buey” is a castrated bull. It is sometimes spelled “güey” in order to soften the insult. Among the young, it is used more like “buddy” than like “dude” and, when a woman uses the term with her husband, she is suggesting that she has been unfaithful to him. It’s a very tricky term and you are well advised to avoid it unless you know what you’re doing. ¡Ay, güey!

“Pelón” means both bald and hairy, that is true. You will also find many other terms applied as the opposite of their normal meanings. You might call this irony although it isn’t. Just stay on your toes.

the etymology is simple:
from the english words “green”
and “go”.

Apparently, (the myth states) they were some “foreign invaders” dressed up in green. And locals, Were not able communicate because of the different languages… so they roughly say “green go” attempting this to be “green go away”… and in Spanish the “ee” changed for “i” and it contracted (“gringo”) it began to be used as a substantive and a prerogative adjective. You add an “s” to the word and you got it plural (“gringos”)

They are other words like “gachupin” – which is the prerogative term used to describe a Spaniard (also white) and gabacho – which is the foreigner who decided to stay and live in mexico.

(I loved the other ones)