smack

What is the meaning of smack in this context:

Soon the bell will ring and the women will go at each other again. Later, after they have heard enough of his smack, they will look at each other, nod slightly, and attack him together. This time the security personnel will wait a little longer, because this final battle is what the audience, both in the studio and at home, really wants to see: the hens going after the rooster.

Source Mr Mercedes by Stephen King.

Thank you

I haven't heard this use of "smack" in a while, but it means "provocative, insulting talk". When I was a teenager in the 70s, I used and heard "talking smack" fairly often: He just called you a coward. Are you going to let him talk smack about you that way?

I've never heard this use of "smack".

That explains the meaning. It is interesting that the book was published in 2014.