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The act of dozing off while masturbating, or jerking off while asleep.
β€œMy boyfriend’s great at slumberjacking, he really knows how to handle wood while he saws logs.”
by PostModernValkyrie June 04, 2018
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2
Masturbating a predefined sleeping apparatus, such as a bed, sleeping bag, or hammock. Often with the intention of passing the fuck out after.
I can't go tonight bro, gonna hit the hay, maybe do some slumberjacking first.
by Shaboyjay August 14, 2014
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