According to markiplier, it is the henchman to a kitchen Hitler. Similar to how Hitler had henchmen to do his dirty work, a kitchenheimer would do all of the dirty work for the head chef of a restaurant.
"Man, I hate being my boss's kitchenheimer. Just because he doesn't want to do the shit-work around the kitchen since he's the head chef doesn't mean that I WANT TO do it."
by The Water Hoe May 9, 2016
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A sous-chef to a kitchen Hitler
The assistant chef at Chilis was a Kitchenheimer because he helped the main chef spit in people's food.
by DownWithMoffat March 18, 2016
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A sous chef to a kitchen hitler.

Description created by Markiplier in his 'Urban Dictionary Challenge w/ Rosanna Pansino' youtube video.
A Kitchenheimer is a sous chef to a kitchen hitler
by Lucielocket March 22, 2016
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A sous chef to a kitchen Hitler , cause Oppenheimer was one of Hitler's henchmen . "And there for a (Kitchenheimer) would be the subordinate to a kitchen Hitler . So he aid's in his crusade against everyone in his kitchen
Man that dude is a "Kitchenheimer" Going on the every whim of a Kitchen Hitler
"Bobby is the Kitchenheimer to our kitchen Hitler"
by Heart1783 April 20, 2017
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The kitchenheimer aids in his crusade against everyone in his kitchen
by ZaraSkies March 15, 2016
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