look up any word, like muddin:
 
1.
To sleep for a very long time.

In particular, longer than you would for a normal sleep and shorter than bedrest
Man, I wish I had just slept instead of slumbered.
by Jason101 December 25, 2005
 
2.
To be in a state of sleep, or being woke up.
"You woke me from my slumber!"
by Loe826 February 04, 2009