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Top definition
Drop a knuckle
When one performs fellatio and inserts a
finger up
their ass to enhance or
spur
an
orgasam
Drop a knuckle when
going down
on your girlfriend just before she
cums
, she will
love it
!
by
DonnyKidd
March 07, 2015
Get a
Drop a knuckle
mug for your buddy Manafort.