Tweentotz 

The breasts that a "tween" (not a child, not a teenager) has. She would tend to show them off as if she thought she had large breasts.

Person A: Look at that girl, showin' off her tweentotz!
Person B: Who does she think she is, Miley Cyrus? Gross. Cover that up!

Tweentotz by littlewitch June 6, 2010

Tweetotaller 

Someone who claims to abstain from tweeting; to never have tweeted; or to be a recovering tweetaholic.

"I'm a tweetotaller. I've never used Twitter in my life. And even if I did tweet, I could give up anytime I wanted."

Tweetotaller by Joller March 8, 2012

tweetotaler 

Someone who has a twitter account and stop writing in it.

@Yumyummin do not write anything on twitter. Perhaps it has become a tweetotaler

tweetotaler by JoTambe December 7, 2010