Bückstabü

A word made up by Rammstein that means "whatever you want it to mean".

A word, probably made up by Rammstein, which is commonly referred to as meaningless, but in an interview Rammstein stated that it's a synonym for lust and uncontrolled sexual desire. It could also be an abbreviation for "Bücken statt büffeln" (bending down instead of studying)

A word made up by the German metal band Rammstein. They've never given a proper explanation of what it means, but its probably made of the two words Bück (=bend over) and Stab (=rod). And if you combine those two words, you got R+ in a nutshell...

A running gag in the darksouls community, played when the "back stab" animation is played.

Originally from a song by the band Rammstein, it's auditory similarity to back stab is part of the reason it's become a joke. How intense it can be interpenetrated as plays the second biggest role in its popularity, as darksouls is infamous for its difficulty and intensity.