If you use a colloquialism or a slang word or phrase, simply use it; do not draw attention to it by enclosing it in quotation marks. To do so is to put on airs, as though you were inviting the reader to join you in a select society of those who know better. (Strunk & White, p. 34) Quotations introduced by that are indirect discourse and not enclosed in quotation marks. Example: Keats declares that beauty is truth, truth beauty. (Strunk & White, p. 37)
cigarette:
Is it a good thing or a bad thing that I recognized your first quotation about ten words into it?