Einstand

Pronounced /aɪnʃtant/ or /ɛɪnʃtɒnd/. Typically non-capitalized if not used in languages other than German.

A german word, originally meaning something along the lines of "honorary joining" or "gift given upon entering service" (and also, a term in tennis).
In Hungarian, the term is nowadays used to describe when someone steals something, though, it originally meant to take something by force, on the "right of the stronger" - essentially, might makes right, and the mighty have the right to all.

This description of the word originates from Hungarian writer Ferenc's Molnár's famous youth novel, "The Paul Street Boys", where it was described as a word used by bigger kids, when they want to take a smaller kid's toys - basically saying that unless the toy in question is handed over, there will be trouble - a one-word note of seizure by force.
While originally an invented re-appropriation, the word soon entered popular slang, thanks to the novel's popularity, and is still widely used today, albeit, it's meaning has now been altered to mean either taking something for your own use (when it is for public use), and hogging it to yourself, or used ironically, when someone takes something before you, simply on a "first come, first served" basis.

I was playing marbles with some of the others, when to big kids from the other school came over, called "Einstand", and took all of our marbles!
Couldn't get the scissors - someone had already einstanded it!

Einstand by Acronymus February 26, 2019

Einstard 

An employee of a national chain of bagel eateries named after what might possibly be the greatest genius of Modern Time. the great irony being in that the employees of said establishments tend to be closer to Retard than Genius, hence Einstard.

Dude, all I wanted was a bagel, toasted, to go. How hard can that be? and yet the Einstard managed to fuck it up!

Einstard by dj roby November 23, 2010