The word you are looking for is adjourn

That point in a lecture, presentation or discuss in which the audience would like you to stop so they can leave. This is usually preceded by excessive rambling, jumping from topic to topic with no clear clue that the audience has had enough. The comment is typically said under your breath with a slight tone of exasperation but is clearly heard by everyone expect the speaker.

Karen “This presentation is taking forever and he is just rambling on and on.”
Presenter “Next we are going to talk about…”
Ben “I think the word you are looking for is adjourn”

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