Hi, everybody! The word slang has no known origin, according to the free online dictionary. Please see here: http://www.thefreedictionary.com/slang Furthermore, it evidently has no other meaning than the one generally known and given in the same reference. I suppose we might safely say the word itself constitutes a slang, except, it is so commonly used and yet is so unique, one may just as safely say it isn't a slang. Also, it is possible that someone somewhere can divulge information about the roots of this word. How would the native speakers choose to classify the word 'slang' as? Thank you!