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Ruffa's definitions

Concentration marks

The red marks you get on your elbows/forearms from resting your arms on your knees after having spent a long time on the toilet.
"Dude, you were in there for a really long time!"

"Yeah man, I was taking a massive shit."

"Bro, you've got some serious concentration marks. Look at your elbows!"
by Ruffa October 12, 2013
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