Originally the term 'spitebomb' meant to multiply downvote a post on a website which uses up/downvoting. The spitebombing was usually done because the poster was unpopular (and often by a clique of attention-whores bearing a private grudge).
The term seems to have originated on the Sparknotes website sometime in 2002.
Both the term, and the practice, are now regularly seen on other websites.
I see your post has attracted fifteen anonymous downvotes. Are you spitebombing yourself to attract attention?
Dougandredougによって 2009年03月18日(水)

5 Words Related to Spitebomb

無料のデイリーメール

毎朝無料の今日のアーバンワード を受け取るために、あなたのメールアドレスを下に打ち込んでください。

メールは daily@urbandictionary.com のアドレスから送られてきます。迷惑メールを送ることは決してございません。

×
http://ja.urbandictionary.com/define.php?term=Spitebomb
ja.urbandictionary.com
crawl=CC-MAIN-2014-49
35900
application/http; msgtype=response
sha1:I7N5RUDNQGN742MW6OTGEPYOAGP7M25A
<urn:uuid:2b2c20c5-afcc-4887-a86d-59e8ff1b6ffb>
2014-11-22T16:43:18Z
199.27.76.207
sha1:DRHIQMXDSLBMEZCLPFFSTUDFWQYUXLSD
<urn:uuid:d2e54a73-9d16-40b4-a161-8849b63814c2>
http://ja.urbandictionary.com/define.php?term=Spitebomb
response
<urn:uuid:f5a05338-a54c-44f7-9c78-7984a85d3614>
robots: classic
hostname: ip-10-235-23-156.ec2.internal
software: Nutch 1.6 (CC)/CC WarcExport 1.0
isPartOf: CC-MAIN-2014-49
operator: CommonCrawl Admin
description: Wide crawl of the web with URLs provided by Blekko for November 2014
publisher: CommonCrawl
format: WARC File Format 1.0
conformsTo: http://bibnum.bnf.fr/WARC/WARC_ISO_28500_version1_latestdraft.pdf