phrasal verb rattle
When you say
that someone rattles on
about something, you mean that they talk
about it for a long time in a way that annoys
I heard my mother rattling on and on about the day I get married, what I must wear,
how I must act, who I must invite.
He listened in silence as Niccolini rattled on, emphasizing his remarks with one hand
and steering with the other.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers