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1.
1. A persistent, abnormal, and irrational fear of a person who is extremely fat (grossly overweight) that compels one to avoid them, despite the awareness and reassurance they are not dangerous.

2. A strong fear, dislike, or aversion for overweight people.
John's obesiphobia prevents him from dating women that weigh over 150 lbs.
by Coul January 22, 2008
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