Top Definition
Criticism that is given via twitter.
@justinbieber your musics shit and you look like a twat.

@anon hey man dont give me so much twittercism :(
by taylortheory March 28, 2012
What Twitterites do to Facebookers...
Mocking the status use of Facebook as opposed to Twitter
He twittercised her status on Facebook as being too mundane.

That is an obvious twittercism of Facebook.
by catahoula March 22, 2009
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