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."
When you meet two girls in kitchener with your friend and you both get laid. Then after the following years, the result becomes a curse, hindering and/or allowing you to either get a lot of girls or none.
I was in the kitchen this morning walking around in circles wondering what the hell I was looking for when the microwave beeped reminding me I was heating up my cup of coffee. My Kitchenheimer's is getting worse!