When someone is on the computer and they go back and forth from other sites to facebook to check if they have mail.
Yo, why do you keep goin to facebook? You must have that facebook itch son.
by Sipacris January 3, 2011
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an irresistible and urgent desire to consult your facebook account straightaway.
David: what's wrong with Sarah, she left without telling us.
Emma: gues she's surfing!
David: emmm, guess she's a "Facebook Itch".
by Wunder Kind May 25, 2015
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