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2.
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.
by hayatsante October 01, 2012

Words related to flench

anus cum fart smell
 
1.
The simultaneous facial and sphincter clench just before a fart is released. 'Flench' is therefore a fusing of the key words 'fart' and 'clench'.
Mary: "My goodness can you smell that? Who farted?"
Joe: "It was Mark, I saw him flench right before the smell hit"
by Fuse fan February 26, 2010