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knee-slapping
[knee-slapping]
noun
1. An action associated with laughter.
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2. Most resemble mathematical formulas: clever, perhaps, but hardly occasion for knee-slapping.
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3. It's not just that he introduces his music and comments on it with a knee-slapping mock-tentative delivery that establishes him hands-down as the 21st-century Jack Benny.
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4. Then, a full-out knee-slapping laugh came out of me, catapulting me back to a time before I knew about self control.