(verb) -- to completely fark up something that has already been fixed once. After Stein Bagger, former CEO of IT Factory, a Danish software company that collapsed on December 1, 2008 after Bagger vanished on a vacation to Dubai, having apparently embezzled more than $85 million from the company which had risen from the ashes after its first collapse during the dot-com crash of 2001-2002.
"Man, I just rebuilt that truck motor, and the way you're revving it, you're gonna steinbag that thing in minute."
A word used to describe stealing something. Often uttered while the act of stealing is in progress. See also: yoink. Invented by Kate with Daiz in a science lesson. Can be used as a noun or as a verb.
Kate: "Stealage..."
Daiz: "Kate, give me back whatever it is you have just stolen from me!"
Kate: "What thing? o:)...?"
*fight possibly ensues*
Daiz: "Get back to your home cupboard..."