a mix of sleeping and forever. or possibly when you are very tired, lack of sleep, and would like to go to sleep, your just slevered.
"i was severely slevered earlier today!"
by kingzkrew July 08, 2009
The much more awesome way to say clever.
HAHA, you're such a loser Alex. Nobody says Clever anymore. It's slever duhhh.
by Icantbelieveitsnotbutterballs July 14, 2010