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Not unsimilar to the condition of "chop tuck", Chop Tuck Fang occurs when the upper lip (chop) is stuck, or tucked, to the gums above the teeth exposing the dog's fang. It can be just the tip of a fang, or it could be a whole mouth full of them depending on the severity of chop tuck.
Couscous was trying to look serious and dignified but failed miserably due to his silly looking and unintentional chop tuck fang,
by Sullen Girl October 09, 2006