Verb: to accidentally dial someone with your cellphone by putting pressure on your phone during sex, causing the listener to hear the sounds of you having sex with someone. Happens when you leave your phone on the bed, or it falls out of your pocket and on to the backseat of a car, onto the couch, etc.
Fuckdialing example: "Me and this girl were banging on her couch and her knee ended up on top of her cellphone--she totally fuckdialed her mom. After we finished we suddenly heard this tiny voice saying 'Hello? Hello?' She was mortified."
A person filed under "brother" or "sister" on a Facebook profile that has no real blood or legal relationship with the profile owner, but given a deep intimacy or friendship by a mutual agreemeent each of the parties gains this title. Its effects are limited to Facebook.
Derived from Facebook + sibling.
See also Facebrother, Facesister.
A:Hello Elizabeth, the other day i was reading your facebook site, and i was surprised to read you have *two* sisters, as your mother told me that she had only two daughters. Is she a step sister, or uterine sibling, or quarter sibling?
B:No Mr Harrison, none othe above, she is just my Facesibling, it's just a Facebook thing.
Using Facebook status updates, comments and other posted material to gather and accumulate knowledge and information about friends, family and loved ones, rather than finding the information through more direct means, like asking the person (or persons) face-to-face, by email or by text.
His girlfriendfound out he was at the frat party instead of work because she went facediving through his older brother's photo album.