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1.
To retroactively "like" or "thumb" a large amount of a persons facebook posts and/or pictures.
That new guy I met is such a facebook stalker. He's been thumb bombing my page for the last week.
by Oyeboman April 23, 2011
 
2.
the act of giving a consumating.com profile as many thumbs down as possible in order to decrease that user's popularity ranking
Elliott's rise to #1 most popular profile on consumating.com was a farce, and turned into quite the scandal after Ben Brown revealed that Elliott only achieved such internet-based notoriety after a vicious campaign of thumb bombing others via numerous fake profiles.
by Elliott February 15, 2006