(verb) when you down-vote all of someone's comments on a site like digg or reddit simply because you dislike one of the user's comments.
Originally derived from reddit for the fact that they keep a running tally of "karma" that you accumulate based on how well your comments rank.
He was ranting about how great GW Bush was, so I went to his profile and started karma bombing the last 6 months of his posts and comments!
by Devaney1984 February 28, 2009
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When something really bad happens to someone who's 'not been very good' through life.
When bad things happen to bad people.
"Wow, life caught up with Jack with that Karma-Bomb."
by Alibi_111 July 18, 2008
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When all the past good (or bad) karma that you've been acquiring catches up in a single event.
Gary however loveable and nice has been a loser & bad with the ladies all his life only to wake up one morning with two of them spending their time with him, thus karma bombed.
by Megalomaniakaal July 22, 2014
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