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A person who is small, mousy, impish, and greasy in demeanor. A grumplin is typically intensely repulsive for a non-apparent reason. Common actions of a grumplin include sniveling and cackling.
Sophie: Who's that little greasy girl sniveling in the corner? I couldn't explain it, but her impishness just repulses me!

John: I'm not sure...but she's quite a grumplin.
by splusj November 17, 2009
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Jul 11 Word of the Day
selfish idiots in my neighborhood who think that they don't need to wear a mask because the rest of us do
A maskhole jogged right past me in the park today
by Bethinslope May 11, 2020
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