Top Definition
a dick that won't get hard
Me - Adam suffers from slumbering lumber even when he isn't drinking.
Jack - He should really see a doctor. They have pills for that now
by docwhoomph July 12, 2010
1 more definition
When you take a long nasty shit in your sleep.
I after I finished fucking this chick we went to bed, but then I woke up the next morning and discovered a slumbering lumber.
by Moseby July 12, 2010

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