Facebook Loiterer 

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.

Facebook Loiterer by gackslayer January 19, 2011