it stands for abgewinnen, ablocken, Gluecksspiele machen--kommt
vom jidd. z(chocken) (Gaunersprache).
It translates into gambling, taking somebody for something etc. e.g. taking
someone for a ride, taking him for what
he is worth, etc. etc.
DE=is normally Deutsche Eisenbahn (German Railroad), but
nowadays there are other possibilities
depending on context, which you did not
provide (unfortunately).