David Crystal Quote

The subject matter ranges from subtle forms of intellectual sarcasm and humor to the crudest possible attacks on a person's courage, sexual prowess, or relatives. At one level, attacks may be subtle and indirect, involving allusion and figurative speech; at another, there may be explicit taunts, boasts, name calling, and jokes at the other's expense.

p. 60 - The Cambridge Encyclopedia of the English Language, 1987