Verb. The act of quickly switching windows away from whatever you were doing (generally fucking around) to something more appropriate (say, Excel) when your boss or other authority figure gets within eyeshot of your screen, thereby maintaining the appearance of diligence.
"The problem with youtube is that when you have to scheizentoggle, the sound keeps playing."
"My boss totally caught me scheizentoggling out of facebook about a dozen times today."
1)Replacement for a swearword, is a cross between german and gobbledegook. Is often said in one's head as it sounds extremely stupid when said out loud.
2) very stupid name for a butler.
1)Oh, schizenhaumer, I left the oven on.
2)Oh, schizenhaumer, I left the oven on. can you go and turn it offfor me?
In the context of Blazing Saddles, she is asking if he would like to drill/dig/carve another hole. That's why she is holding a rather large German sausage when she asks "Would you like another schnitzengruben?"
In other words, she wants to fuck again!