2 definitions by Fiddle de de

Someone that that has a facebook account just to "pop up" and make smartass comments on all their frienemys statuses. These insults are usually followed with an "lol" which makes it an (un)funny joke to everyone, but , hilarious to the Groundhog.
Status: Got a softball game tonight, hope it doesn't rain.

Facebook Groundhog: I hope it rains tonight, because you suck at Softball... lol
by Fiddle de de May 9, 2014
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Someone that usually puts up pics or status updates on facebook and never get as many likes or comments that they think they deserve. So the next best thing is to tag your friend in the comments (hoping that the friend will be forced to comment or at the very least, a friend of the "tagged" friend, might make a comment)
The lonely facebooker posts:

pic of big garbage bag

Hey (tagged friend) I just got this out of your car.....
by Fiddle de de May 9, 2014
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