Also, a fershnoogler is one who fershnoogles.
Very closely related with the word filch.
-After repepetively borrowing pencils from me without returning them, I realized that Julie was a habitual fershnoogler.
-Gosh! Why do you always have to come to my house and fershnoogle my food?
-Someone fershnoogled all of my paper clips. Them 'darn fershnooglers!