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to be on (and on) about sb/sth
01
to continue talking about a certain subject in a tediously and lengthy manner
![to [be|keep] on (and on|) about {sb/sth} definition and meaning](https://cdn.langeek.co/photo/42264/original/?type=jpeg "to [be|keep] on (and on|) about {sb/sth} definition and meaning")
例子
He kept on about it so much that I agreed.
I wish he wouldn't keep on about his dietary habits during every meal.
Our guests were on and on about the food.
