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1.A dog that pees on your hardwood or laminate flooring every morning even though she just went outside. Most Jynxxes have very sharp white hairs that she'd everywehere and are extremely difficult to get out from clothing, interior of your car, and furniture.

2. an aberration, mistake or faux pas.
I got a new puppy but took her back to the pound when I realized she was a Jynxx.
by Kamikaze1021 June 20, 2015
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