- What's the origin of the word "chido"?
- When did it become popular in Mexico?
Qué chido esta tu carro.
Estaría bien chido si ganara la lotería.
adj. Méx. bonito (? lindo).
adj. coloq. Méx. Muy bueno.
There are several theories as to the origin of Chido the one that is the most accepted one is that it came on the migratory waves of the XIX century coming from Asturias in Spain. From the word xidu in asturian, that practically means beautiful, and nice.
The term first appeared officially in Mexico under the dictionary of criminal slang of Carlos Roumagnac in 1904.
Another theory states that chido derives from the word in spanish chiro that in the streets means brilliant. Specially in Tepito, Mexico.
So to answer the question it most likely became popular during the XX century, used mainly in slang. And its origin is debatable, though the most accepted theory is it comes from asturian xidu.
There are additional theories that are documented on wikipedia if you further read the references sources.