to persuade with facile argument, usually with the intention to deceive or to overwhelm rational objections: The salesperson tried to fast-talk me into buying a suit I didn't want.
fast-talk (fāst'tôk') tr.v.
fast-talked, fast-talk·ing, fast-talksInformal To persuade, mislead, or obtain with a smooth line of talk: fast-talked him out of his money; fast-talked her way into the show. fast'-talk'er n.