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The Tibbe test is a test one uses to measure the thickness of a penis by using a toilet paper roll. You simply try to put your erected penis through the hole on the toilet paper roll. If the penis stops because of massive girth, you have passed the tibbe test and you have the penis of a champion, girth wise. If the penis goes right through, you have failed. And if the penis doesn't stop, nor comes out the other end, you have failed in an epic way.
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