A person who floods inboxes and facebook home pages of all his or her friends with incessant (re: obnoxious) updates. This person considers even the most mundane events in his or her life to be important enough to broadcast to the world, and in the majority of cases writes in incomplete sentences and obnoxious "SMS shorthand".
Twittard 1: (via his iPhone): "TP I bought @ Costco 2day is hella soft!! \m/."
(Ten minutes later)
Twittard 1: (via his iPhone): "Dood 2ply ftw"
(Two minutes later)
Twittard 2: (via his Windows Mobile phone): "@Twittard1: +1"
(Two minutes later)
Roommate of Twittards: (via the living room at the end of the hallway): Get a life, Twittards, you're wasting everyone's battery.
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