a person on twitter who exhibits OCD-like, compulsive, or repetitive behavior evident through the frequency and content of their twitter postings, often making insignificant announcements about mundane aspects of their lives is said to be "tweetin"
-- he just posted 4 lines on twitter, hes tweetin hard
-- i was tweetin in my room for like 4 hours
(v.) To suck your own cock
Sean: "Hey Kevin, did you know there is no word for sucking your own cock?"
Kevin: "Nah bro, it's called tweetin"