(Verb) To Zuber is to send a blank email, or to reply to an email without adding any text. Particuarly used when trying to send attachments to groups who block them, but not exclusively.
Source is a group that continually received blank emails from a member before banning him for trying to send artistic pictures of himself.
Note; Past tense may either be Zuber'd or Zubered.
(Noun) A Zuber: The resulting non-message of Zubering.
(Noun) A Zuberer: someone who habitually sends Zubers.