noun
a talk or lecture that is informal or spontaneous, often given using a chalkboard or visual aids
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During the conference, the expert delivered a detailed chalk talk on the latest advancements in artificial intelligence.
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Hey, do you want to grab a coffee and go over that chalk talk presentation together?
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I totally aced that chalk talk in class today, no sweat!
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The CEO's speech was like a chalk talk, breaking down complex ideas into simple concepts for everyone to understand.