Paradox Duplicate 

A duplicate created as a result of time travel. When one object travels to another time where that same object also exists, then two of the exact same object occupy the same time. The popular theory is that one of the paradox duplicates is doomed to destruction as a result of the universe attempting to correct this violation of the reality matrix of existence. More pressing is the belief that, were the duplicates to come in contact with one another, it would violate the very basic law of physics that 'no two objects can occupy the same space at the same time', and, thus, unmake the universe.

"That's why i didn't want us to meet, Fry. We're paradox duplicates. The more we stayed away from each other, the better chance we had of staying alive. I guess I was wrong...(cough)"
-Futurama: Bender's Big Score

Paradox Duplicate by Razorglove January 26, 2010

Dumplicate 

"dump" and "duplicate" combined to mean "the same piece of shit."
A duplicate that is as bad as the original.

I asked him for a revision, but he gave me a dumplicate.

Dumplicate by stopforgetting August 20, 2014

Duplicate the wheel 

Alternative way to say “reinvent the wheel”

Emily told her co-workers, “I really don’t want to duplicate the wheel”

Duplicate the wheel by C2C123 May 25, 2022

dueplicate 

Fake/invalid bill for a debt dat's either already been settled or is not owed in da first place.

One should not automatically pay any and all "please remit" statements dat one receives --- instead, be sure to carefully examine each and every one for authenticity; there are lots of dueplicates out there!

dueplicate by QuacksO October 27, 2023