Sentence:  ... they, consequently, both misconceive and misuse words ; and we are sorry to add, that this childish <WSD>slipslop</WSD>, those infantile blunders, is, and are, much more frequently a source of parental mirth, than of parental reprehension : yet it is certain, that such oral deviations, if suffered to continue unremakred, harden into habits, and fix, indelibly fix, the vernacular errors of infancy upon the minds of maturity. 
Meaning of the word marked with <WSD> tags:  Nonsense; gibberish; twaddle.