Informal a situation or activity, as a suspenseful drama or highly competitive game in sports, with an outcome so uncertain that it creates much tension or anxiety
Origin of nail-biterin allusion to the habit of chewing one's fingernails when anxious or nervous
- One who bites one's fingernails as a nervous habit.
- A situation marked by tense nervousness or apprehension, especially an athletic contest whose outcome is uncertain near its finish.
- nail biting
- Alternative spelling of nail-biter.