[…] the uncultivated have current in their dialect a host of inaccuracies, offenses against the correctness of speech- as ungrammatical forms, mispronunciations, blunders of application, slang words, vulgarities; all of these, perhaps, analogous with alterations which the cultivated speech, as compared with its predecessors, has undergone, and some of them destined to become at a future time the established usage of the whole language; but yet kept down in the category of errors by the resistance of the higher classes to their acceptance and use.
- Whitney (1875), Pag. 155-156