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1 definition by Deer John

 
1.
1) strange fabric that is found in the belly button.
2) nickname for someone who puts his finger in his belly button.
3) old skin that is inside your belly button

someone who collects belly button fluff is called: a belly button fluffer
"tibo always sticks his finger in his belly button, what a belly button fluffer."
by Deer John April 05, 2013