A female celebrity with a huge grotesque grin. Coined by radio DJ's Don and Mike to describe Cameron Diaz.
A reference to the poisoned products that The Joker unleashed on Gotham City in the movie "Batman" which killed their victims and left them with horrific grins on their faces.
I hear Justin Timberlake is dating New And Improved Joker Product
by Steve Aardvark December 18, 2006

5 Words Related to new and improved joker product

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