a person who regularly uses more than one social networking site(such as myspace, bebo, facebook, twitter, friendster, etc)

OR

Someone who spends more than an hour a day on a social networking site.

Usually a combination of both. Social networking whore's get off when they get comments or pokes and generally go through acute depression and anxiety when they sign in to find no updates at all.
That Lily Allen is always blogging on myspace and updating her twitter. She's like the original social networking whore.

Steph has facebook, bebo, myspace and twitter and goes online everyday. She's such a social networking whore.
by charjackson March 8, 2009
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somebody who posts relentlessly and comments on everything is secretly a controlfreak of their own implied awesome and has little self control, in controlling it.
Jan posted and commented on six pictures in fifteen minutes, though her friends agree, on the whole, she's annoying. She is being a total social network whore.
by blabagaga December 6, 2013
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