shweeping

a. A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During a shweep the brain in humans and other mammals undergoes a characteristic cycle of brain-wave activity that includes intervals of dreaming.

b. A period of this form of rest.

c. A state of inactivity resembling or suggesting sleep; unconsciousness, dormancy, hibernation, or death.

Gregory didn't go to the Ceeps because he was shweeping.