A practice performed by many girls nowadays. It is characterized by when a girl pretends to be nice on the surface and smiles often, but is a pretentious bitch underneath that superficial disguise.
James: Hey Laura, what's up?
Laura: Nothing much, what's up with you? How was that concert last night?
James: It was great! Ugh, I don't know how to do this math problem.
Laura: How could you not get this? It's so easy, lol.
James: Oh, ok...
Conrad: Isn't Laura awesome?
James: No way dude, she practices concealed bitchery.
twitter is one of the richest companies in the world and can easily afford to hire staff to find inappropriate accounts to report and suspend but why bother when there is plenty of slacktivists that will do the job for free.
Such slacktivists are too dumb to realise they are being exploited.
Such people are known as twitters bitches.