What is a slang ?
Few linguists have endeavored to clearly define what constitutes slang.
Attempting to remedy this, Bethany K. Dumas and Jonathan Lighter argue that an expression should be considered "true slang" if it meets at least two of the following criteria:
It lowers, if temporarily, "the dignity of formal or serious speech or writing"; in other words, it is likely to be seen in such contexts as a "glaring misuse of register."
Its use implies that the user is familiar with whatever is referred to, or with a group of people that are familiar with it and use the term.
"It is a taboo term in ordinary discourse with people of a higher social status or greater responsibility."
It replaces "a well known conventional synonym." This is done primarily to avoid "the discomfort caused by the conventio ...more