In the world of radio show pranks and stunts this is the "hardcore fan" that calls in or more commonly, posts on a fan message board, and explains to the entire listening/viewing audience the "magic" behind the bit. This in turn takes enjoyment away from the intelligent listeners who are able to discern between real and fake. Often the specified "fan" has an inordinant amount of time on his or her hands for research or long-winded diatribes describing any discrepancies in detail. The bit ruiner often sees their show as attempting to gain publicity through dishonest means.
Note: This could also apply to wrestling or other such "in-universe" type real-life based fiction.
"You are a bit ruiner, can't you just go with it and enjoy the show?"
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A person who Smothers everything with ketchup or other sauces even when the food was already delicious
Tony told Chelsea she was a food ruiner as she squeezed a bottle of ketchup on her filet mignon.
Just a controversial type of person who ruins someone's childhood, they have probably existed since the invention of the internet.
The internet literally has childhood ruiners.
A person that loves to ruin the lives of others. Making an intricate plan to destroy someones life for little or no reason at any cost.
The ruiner of lives chooses a victim and vows to destroy him.
Similar to a Shit Stabber however these kind of homo's ruin the rectum region.
Alan: Was that alright for you?
Eric: Orrr nooo your such a rectum ruiner... i'll be shitting for days!!
Someone who constantly ruins your life with their perfection, and smiles while they do it
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Damn, that Steven Moffat is a life ruiner with all these cliffhangers!
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