A tiger's head and a snake's tail
Used when someone starts doing something with great effort and vigor, but then fizzles out and ends weak
Negative
电影非常令人沮丧而且还虎头蛇尾的 | Diànyǐng fēicháng lìng rén jǔsàng érqiě hái hǔtóushéwěi de
This movie is extremely depressing and also anticlimactic
[Source]
他每件事都弄得虎头蛇尾，还能期盼他扛起什么责任吗？ | Tā měi jiàn shì dōu nòng dé hǔtóushéwěi, hái néng qīpàn tā káng qǐ shénme zérèn ma?
He never properly finishes anything. What kind of responsibility could you expect him to take on?
[Source]
None
龙头蛇尾 (lóng tóu shé wěi)
None
《李逵负棘》(Lǐ Kuí Fù Jí), a work by Yuán Dynasty (元, 1279 - 1368) writer 廉进之 (Lián Jìn Zhī)
This chengyu comes from a line in the work listed in the "Origin" section above