Someone who makes a lot of jokes against people, but can't take a joke himself.

He will probably fire back with something unrelated or way out of line.
Pulled a DunCum is defined in the following example:
Jerome: "Hey Joris, What is the differance between you and a apple? An apple is less fruity.

Joris: "You have no dad, and nobody likes your existence"

Leon: "ah Joris that was not necessery. Why did you pull a DunCum?"
by Jochem Myjer April 13, 2023
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