to do the frömsdorf

Leaving a conversation, meeting or situation with one or more people without saying good bye or anything. Normally performed without anybody noticing at first.

Where did Bruno go? I haven't seen him for a while. I guess he did the frömsdorf.

Did Emily just leave? He did not even say something. Well apparently he did the frömsdorf.

It is his way to leave withiut saying anything or to do the frömsdorf.