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1 definition by
Nasbaby
knuckling up
major
shrinkage
of
a man's
penis to the size of a finger between two
knuckles
Wow it's cold out, I can
barely
see
my dick
, it must be knuckling up.
I don't have a
micropenis
, it's just knuckling up!
by
Nasbaby
December 16, 2010
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Get the
knuckling up
mug.