These are borderline human beings that sneak around while everyone else is working and steal sandwiches and soda from lunchroom refrigerators. They are rarely reprimanded because the owner of the company is a republican and loves the cheap labor.
"Ha, Ha. Doris, head of the lunchroom thieves, is going to be surprised when she realizes I spiked that coca-cola with phenolphtalien." See "making the brown rumble".
To take something small, that doesn't quite qualify as a theft. Probably from the Danish "skæv" or the Dutch "scheef", both of which are pronounced similarly, meaning "askew, or not quite right'. To change an item's ownership without permission, but only something small and of little worth.
"I skeefed an apple off the neighbor's tree." "I skeefed some chips outta your bag when you looked away." "Don't skeef my chair when I go to the bathroom."