Noun
(Internet) A web page created for the purpose of attacking a person or group, either through hateful content or through hacking or other technological measures.
Hyponym: hatelisting
(Should we delete this redundant sense?) (Wikimedia jargon) A page, in any namespace, whose sole purpose is to attack, threaten, disparage, or defame one or more persons, usually the subject or subjects of the page.
Under Wikipedia policy, users who create attack pages are likely to be blocked from editing.