Top definition
Taken from the social networking site, Twitter, twitter mouth describes someone who constantly has to update anyone who is listening, whether they care or not, on everything that's going on in their life/what they're currently doing down to the second. They never shut up.
She's always telling everyone what she's thinking, who she's texting, when she's going to eat, where she's going tonight. She's such a twitter mouth.
by i-zilla March 06, 2009
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