A twitter head is a person who likes to twitter 24 hours a day, 7 days a week. They will twitter about anything that comes to mind. Even twittering about twittering.
I'm such a twitter head! - 10 min ago
I can't believe I twitter this much - 11 min ago
Lolz my back hurts - 12 min ago
I just fell down - 13 min ago
No seriously check this out - 14 min ago
Wow check this out - 15 min ago