plausible glib talk (especially useful to a salesperson)
"The salesman spent twenty minutes on his slick spiel about how much money we would save, but I knew it was just empty promises."
A lengthy and extravagant speech or argument usually intended to persuade.
"After hours of intense competition, the final shot decided who would win the high-stakes curling spiel at the regional championships."
A game of curling.
speak at great length (about something)
"After three hours of his political spiel, I finally asked him to stop talking about himself and start answering my questions."
To talk at length.
"After thirty minutes of his sales spiel, I finally convinced him to let me speak."