(n) (insult) A big mouth. The owner of the tit jaw usually has a mouth that's too large, sometimes meaning they talk too much. Can also be used to mean that the person eats too much. Also used to evoke baby-like images of the person.
Damn, Natalie. He's got the body, but just look at that ugly tit jaw.
by The Other Shoe January 18, 2017
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