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1.
Deleting/wiping everything on your Twitter page, effectively committing social networking suicide on Twitter.
My friend committed twittercide when she realized nobody cared about the boring things she does. Her real-time useless information will be missed.
by rtil August 10, 2009
 
2.
Being eliminated from a position or social setting in the wake of posting stupid and/or offensive crap on Twitter.
"Always-On" Adam Orth became a victim of Twittercide today, being let go from Microsoft after managing to piss off nearly any XBox gamer with his dumbass #dealwithit remarks.
by heavyweightboxer April 10, 2013