Top Definition
Pre-morning wood.
While still sleeping girlfriend notices you have an erection.
So the other night I unknowingly had sex with my girlfiend with my slumber lumber.
de kmichener 17 juin 2011

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alternate term for "morning wood"
The maid was aghast when she found the sleeping lumberjack, snoring, his slumber lumber proudly in view.
de Dan Farman 9 mai 2004

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Slumber lumber is another euphemism for waking up with an erection- otherwise known as 'morning wood'.
"I woke up with some gnarly slumber lumber and I asked if I could take it to her sawmill."
de kdutremble 9 décembre 2009

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A more sophisticated version of morning wood. Usually when you are fully asleep, and the blood can add extra power.
Sarah: After Steve fell asleep, he got the most AMAZING slumber lumber last night.
Kiki: Wow, I wish my man, Jamal had that.

Sarah: True Story
de TheTrueStoryGuy 8 mai 2014

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