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- Dictionarynail-bit·ing
adjective
- 1. causing great anxiety or tension: "a nail-biting final game"
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adjective
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Nail biting, also known as onychophagy or onychophagia, is an oral compulsive habit of biting one's fingernails. It is sometimes described as a parafunctional activity, the common use of the mouth for an activity other than speaking, eating, or drinking. Nail biting is very common, especially amongst children. 25–35 percent of children bite nails. Wikipedia