What does "a bit of a tartar" mean?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Popsicle Puzzles

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Chapters
00:00 What Does &Quot;A Bit Of A Tartar&Quot; Mean?
00:41 Accepted Answer Score 16
01:26 Answer 2 Score 8
01:48 Thank you

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Full question
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Tags
#meaning #britishenglish

#avk47