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Person who stays on or checks Facebook all day via computer or handheld device and likes and comments everything he sees on his News Feed.
Dude 1: Dude, if you go down my news feed and look at everyones status, John has liked and commented almost like 80% of everything on it.

Dude 2: Well yeah, ever since he got that new Itouch, he's turned into a Facebook Loiterer.
by gackslayer January 18, 2011
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