backcrack

A butt crack that extends above the waistline sometimes even to the middle of the shoulder blades.
Man JD has a bad case of backcrack!
by superknox1andonly December 22, 2014
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Backcracker

When you take such an enormous dump that it cracks your back as it leaves the body.
Man, that was a backcracker… great dump!
by Repanoodle June 06, 2025
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