1 noun personshe's a nail-biterbíonn sí ag ithe a cuid ingne2 noun informal tense situation etcthe film's a nail-bitertá an scannán lán le teannasthe match was a nail-biterbhí coimhlint ghéar sa chluiche go dtí an deireadhthe wait for results was a real nail-biterbhíothas ar tinneall ag feitheamh leis an toradh