German expression meaning "fuck off" or just "fuck you", literally "fuck your knee". The origin of this expression is a pun with the archaic word "Kniefiez", meaning a very avaricious person such as Scrooge McDuck. Therefore, its original meaning was "If you're to cheap for that, you can go and fuck yourself.". However, with time it has become a more general expression that could be used equally well in any other context.
100 Mark für einmal kurz blasen? Fick dich ins Knie!
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".