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second knuckle

When fingering a girl. One inserts their finger so deep at it reaches the second knuckle.
I went second knuckle deep in Sarah last night.
by EvilD July 5, 2014
mugGet the second knucklemug.

second knuckle deep

When a person inserts the finger into the caboose till the second knuckle is hidden by the rim.
Chris goes second knuckle deep while wiping his ass, not on accident.
by bigdaddyln June 10, 2008
mugGet the second knuckle deepmug.

second knuckle deep

When a person inserts the finger into the caboose till the second knuckle is hidden by the rim.
Chris goes second knuckle deep while wiping his ass, not on accident.
by bigdaddyln June 10, 2008
mugGet the second knuckle deepmug.

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