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A lovely creature who can get a little jumpy at times and has a strange appitite.

Example: She is a total Tilli!
Other Example: Tilli has a wierd diet!
by 2233445566778833 February 07, 2014
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Commonly used to refer to a young girl's vagina
Jessica make sure you was your tilli in the tub today.
by Cwentz11 May 25, 2017
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