four-letter word noun2 •A reference to any of several of the strongest English swear words that are also four letters long, especially those composing the so-called seven dirty words.Good authors, too, who once knew better words / Now only use four-letter words — 1934 •A swear word or any words considered to be taboo in a given scenario (regardless of length of word).People say that you were born lazy / because you think that work is four-letter word — 1968 formsfour-letter words
