| 1. | flench | ||
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The simultaneous facial and sphincter clench just before a fart is released. 'Flench' is therefore a fusing of the key words 'fart' and 'clench'.
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| 2. | Flench | ||
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The Knee Deep in Pain book defines Flenches as a combination clench and flex. Flenches are done to build muscle strength slowly, with deliberation. Flenches help in combating arthritis.
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