Term used when referring to the depth of a women’s ass crack. With your fingers extended and inserted into the ass crack to the depth of your Metacarpophalangeal joints (main knuckles.
by anonymous December 26, 2025
Get the Knuckler mug.A crusty knuckle is when you have your girl stimulate your prostate by shoving her middle finger up your anus. Look at her knuckle once she is done.
by John Chapman June 1, 2007
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Chris: Just got done fingering Ashley.
Ken: I thought you had some slippery knuckles.
Chris: Just got done fingering Ashley.
Ken: I thought you had some slippery knuckles.
by Slippery Knucks February 18, 2010
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