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(mouth-I-tis) A common phenomenon when one can't control the impulsive desire to shoot off one's mouth. Friends nor family is safe from the person suffering from mouthitis for they will spill secrets, twist words and just plain make up stuff for their own twisted fun. One must always remember not to confide in a mouthitis sufferer. Only do so if the information shared with a mouthitis sufferer is something you want to become widely known as sharing with them basically guarantees it. Mouthitis sufferers are also in essence "back stabbers" and do not make good friends.
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