The act of internally vandalising another persons unlogged out facebook page. This may involve changing any or all of the following: status, profile pic, relationship status, info column, comments, pages joint, etc.
Generally the greatest facebook bombing involves changes such that much of the user's friends don't realise the foul play involved.
An Atomic facebook bombing is similar but involves changing as many things as possible in the most offensive way possible.
example 1: status

Louise Genzby: Just did the biggest shit aye!! Had to chop it up with the spatula to get it to flush!!!
---Reply 1: ewwww gross!!
---Reply 2: TMI!!!
---Reply 3: hahahaa great facebook bombing!!!

example 2: page joins

John Henry just joined the groups "Hot Guys", "Anal is Awesome," and "My Mother is Totally Hot"
by gekael February 10, 2010
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to go back several months and comment on someone's wall
Peter's really pissing me off lately, he's been Facebook bombing me all day!
by Dropkicknoonan August 4, 2010
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The act of internally vandalising another persons unlogged out facebook page. This may involve changing any or all of the following: status, profile pic, relationship status, info column, comments, pages joint, etc.
Generally the greatest facebook bombing involves changes such that much of the user's friends don't realise the foul play involved.
An Atomic facebook bombing is similar but involves changing as many things as possible in the most offensive way possible.
example 1: status

Louise Genzby: Just did the biggest shit aye!! Had to chop it up with the spatula to get it to flush!!!
---Reply 1: ewwww gross!!
---Reply 2: TMI!!!
---Reply 3: hahahaa facebook bombed!!!

example 2: page joins

John Henry just joined the groups "Hot Guys", "Anal is Awesome," and "My Mother is Totally Hot"
by gekael February 10, 2010
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The act of writing a totally unrelated comment to someones posting.
fb user- Im cant get rid of this cold!
fb user 2- Try alka seltzer.
fb user 3- Try a beer!lol
facebook bombing- Francine got a great job!
fb user 1- wtf????
by Higross February 3, 2010
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When a (most of the time attractive) girl or guy uploads a (profile) picture on Facebook that gets a massive amount of likes or attention; stirring up the social networking community.
Yo bro did you see Alexandra's new profile picture? She's looking so good. 100+ likes? 36 comments? A Facebook bomb was dropped today.
by TxTau1856 May 22, 2013
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The act of deleting all wall posts, friends, and applications, as well as untagging all pictures, and deleting the account.
Dan: My account was deleted. When I reactivated it, I realized that everything was deleted.
Jake: You were Facebook Bombed. Someone must not like you.
by Dreadnaught December 28, 2009
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When you wish Happy Birthday to someone by copying what someone else (who you don't know) has posted on your friends wall. Ideally, this will be some inside joke that you know nothing about, be slightly personal and a little bit weird.
Facebook Birthday Bombing is doing this to a girl/boy you kind of know, don't really know what she's up to and don't intend to see anytime soon...

"Happy Birthday Babes!!! WONDERFUL to see you last week, hopefully this weekend at Ollie's will be megabants!!! xoxoxoxox P.s. Ibiza 2k8. Always remember it!!"
by The Banter Bus October 31, 2011
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