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When someone has white teeth but they think that their teeth are yellow so they obsess over brushing their teeth/whitening them. Similar to anorexia but involving an obsession over teeth rather than weight.
Jim: "My teeth look so yellow today."
Bob: "Dude your teeth look completely fine. They actually look pretty white today."
Jim: "Oh, we'll I'm just gonna brush my teeth again later anyway."
Bob: "Wow you actually have a problem. You might even be denterexic."
by Unknown denterexic patient April 26, 2013
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