The bad taste in your mouth just after waking up from a nap.
"*Yawn* Man I just woke up and now I have nap mouth, god damn."
by Keroberos November 17, 2006
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When you awake from a casual nap and notice the terrible, weird taste in your mouth. It feels chalky and taste raunchy.
Who jizzed in my mouth while i was napping? I fucking hate nap crap mouth!
by Titty McDick April 17, 2011
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