putting a cucumber up a girls pussy or butt and then snapping it off, leaving half of the cucumber up their hole.
I gave Rachel the cucumber slumber last night.
by Hiawatha October 22, 2006
(Adj.) When you accidentally slip out during sex and upon re-entry ram !00% of your penis forcefully into the girls anus, which causes her to blackout and go unconscious.
Did you hear the story about how Uncle Willie gave the cucumber slumber to that crazy Canadian woman at the Pink Palace?
by TheCuc March 07, 2014