chomp at the bit
US /tʃɑmp æt ðə bɪt/
UK /tʃɑmp æt ðə bɪt/

1.
迫不及待, 跃跃欲试
to be eager or impatient to do something
:
•
The students were chomping at the bit to start their summer vacation.
学生们迫不及待地想开始他们的暑假。
•
After months of training, the athletes were chomping at the bit to compete.
经过数月的训练,运动员们迫不及待地想参加比赛。