Signifyin' (sometime written "signifyin(g)") (vernacular), is a form of wordplay. It is a practice in African-American culture involving a verbal strategy of indirection that exploits the gap between the denotative and figurative meanings of words. A simple example would be insulting someone to show affection. Other names for signifyin' include: "Dropping lugs, joaning, sounding, capping, snapping, dissing, busting, bagging, janking, ranking, toasting, woofing, putting on, or cracking."
Signifyin' directs attention to the connotative, context-bound significance of words, which is accessible only to those who share the cultural values of a given speech community. The expression comes from stories about the Signifying Monkey, a trickster figure said to have originated during slavery in the United States.
The American literary critic Henry Louis Gates Jr. wrote in The Signifying Monkey (1988) that signifyin' is "a trope, in which are subsumed several other rhetorical tropes, including metaphor, metonymy, synecdoche, and irony (the master tropes), and also hyperbole, litotes, and metalepsis. To this list we could easily add aporia, chiasmus, and catachresis, all of which are used in the ritual of Signifyin(g)."
Rudy Ray Moore, known as " Dolemite", is well known for having used the term in his comediac performances. While Signifyin(g) is the term coined by Henry Louis Gates, Jr. to represent a black vernacular, the idea stems from the thoughts of Ferdinand De Saussure and the process of signifying--"the association between words and the ideas they indicate." Gates states, "’Signification,’ in Standard English, denotes the meaning that a term conveys, or is intended to convey." Gates takes this idea of signifying and "doubles" it in order to explain signifyin(g). He states of Black Vernacular, "their complex act of language Signifies upon both formal language use and its conventions, conventions established, at least officially, by middle-class white people."