[with infinitive](informal)very enthusiastic and eager to do something (非正式)渴望的,急切的,一心向往的 she was raring to get back to her work. 她急切希望重新工作。 I'll be ready and raring to go. 我很乐意,巴不得马上开始。
语源
1920s: present participle of rare, dialect variant of roar or rear