The act of posting using a smartphone or any mobile device on sites like 4chan or reddit.
It's usually seen as a bad thing, specially by oldfags, since these sites are better known of being used in more traditional platforms like desktop and laptop PCs.
A person who never uses Facebook for social networking but rather to accumulate an alphabetical list of people like a phonebook. A Facebooker that uses Facebook soley to respond to friend requests, but never posts a single status update, makes comments or even has a profile picture.
"Jane is such a phonebooker! She has 333 friends on Facebook and has never posted anything on her profile, not even a picture."
"Don't be such a phonebooker! Update your status every once in awhile!"
NATO devised version of the english alphabet.
a - alpha b - bravo
c - charlie
d - delta
e - echo
f - foxtrot
g - golf
h - hotel
i - india
j - juliett
k - kilo
l - lima
m - mike n - november
o - oscar
p - papa
q - quebec
r - romeo
s - sierra
t - tango
u - uniform
v - victor
w - whiskey
x - xray
y - yankee
z - zulu