doppelblogger 

Refers to a blogger who uses plagiarism to fill content on his or her website thereby creating a 'ghostly apparition' of the original source.

That doppelblog is just some doppelblogger who can't write for himself, sooner or later someone will catch on.

doppelblogger by MaxPower.ca May 6, 2006

doppeldogger 

a human or a dog that strongly resembles the other.

woah this lady looks just like her borzoi! they are totally doppeldoggers.

doppeldogger by Jeff Pink February 3, 2024

Doppelflagger 

Definition:
An anonymous online user who deliberately accuses their own posts or identities of belonging to someone else, typically to create confusion, manipulate perception, or provoke reactions within a discussion. The doppelflagger engages in intentional false-flagging behavior, often simulating paranoia or conflict to disrupt discourse or discredit others.

Etymology:
From Doppelgänger (a duplicate or double, often associated with deception) + flagger (one who reports or disavows content).

Usage:

“The thread’s a mess—some doppelflagger is playing both sides.”

“Classic doppelflagger move: start a fake argument with yourself, then blame someone else.”

Doppelflagger by Anonymous694201488 March 21, 2025