The condition of being slow witted or mentally fatigued, often brought about by sleep deprivation, partying, overworking or over studying, excessive use of television, video games or computer time; cognitive atrophy. It will feel like there is a cloud where your brain should be making it hard to think, concentrate, solve problems, or keep up with conversations.
I feel out of it today man, I have a serious head cloud right now.
by withinthecube December 27, 2012

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