An old flaking urethra, and or anus. Mostly caused by an over-used pussy or asshole, but may be a side-effect of old age.
Steven's grandmother was unmoist, so his grandfather made Steven unmoist.
by Stormie Renee' May 24, 2008
Top Definition
When a situation is not in your favor and becomes stressful or unfortunate.
That fight was so pathetic and unmoist, I just can't believe I lost!
by Liquid Pie August 17, 2008
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