Urban Dictionary: Definitions by Tony Rosenstein

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Knuckle Sludge

Extending one's finger and ramming said digit into the anus until the knuckle reaches the rectum.

Nothing beats reruns of "Welcome Back Kotter" and gettin' the ole' Knuckle Sludge.

by Tony Rosenstein April 6, 2006

Get the Knuckle Sludgemug.

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