Never waking up for anything during a long duration of sleep.

ex. ' i slept 18 hours without going to the bathroom or anything, i was in sleep coma'
by ChrisXPPro August 30, 2008
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When you pass out for long periods of time from massive exhaustion or sedatives, and wake up feeling awesome.
I passed out right after work, I've been in a sleep coma for almost 15 hours.
by ReignKaos August 24, 2010
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