Metaphor - a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable.
Simile - a figure of speech involving the comparison of one thing with another thing of a different kind, used to make a description more emphatic or vivid
Hyperbole - extreme exaggeration
Verbal Irony - figure of speech. The speaker intends to be understood as meaning something that contrasts with the literal or usual meaning of what he says.
Because of the quotations around the statement. "GOod-mawnin' , suh," he said , lifting his cap politely. This shows someone is speaking to someone else. That means Dialect is happening.