The scale of the intensity of the need to expel a "running-induced crap." 1 would be slight abdominal pain; 10 would be an explosion capable of setting the sky on fire.
"I was so humiliated when I hit a 10 on the Ricter scale at the last mile of my long run. At my running buddies bought me beers afterward to make their making fun of me bearable."
by AP Styles August 08, 2009

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