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1.
zzZzz
zzZzz Sleep (n) : the natural periodic suspension of consciousness during which the powers of the body are restored.
by - Nick B. - November 27, 2010
 
2.
A comonly used expression by those who are sleeping.
When someone has ZZZZZ over thier head, DON'T FUCKING BOTHER THEM!!!!
by Guy who likes to sleep April 10, 2008