that when smoked doesn't get the smoker high right away. Instead of the usual near instantanous high that the weed creates, Creeper Weed takes an additional 5-10 minutes to kick in. Usually the situation is like this.
Johnny Random Smoker
"Man, I smoked this whole joint
by myself and I don't feel anything."
Ten Minutes Later...
"Maaan...I'm soo stoned...I guess we had some Creeper Weed."
Creeper Weed is very potent, but sadly it's not found that often. Who knows..maybe it's from the CIA