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Pain Mountain is when you're so sore you think you're climbing a mountain made of broken bones and regret. It’s like your body is on fire and your brain is screaming for mercy.
I just ran a marathon and my legs are Pain Mountain.
After that karate class, I was like, 'I'm on Pain Mountain and I'm not coming down.'
My back is so stiff, I swear I'm climbing Pain Mountain in my sleep.