?害怕

... stick a tail up翘尾巴 get one's tail down害怕,失去勇气 get one's tail up情绪很高 ...

?失去勇气

get one's tail down 害怕; 失去勇气 We can get one more in if you shove up. 向前挤一挤我们还能再进一个人。