庞然大物 huge thing
Explanation
形容体积巨大、笨重的东西。也比喻外表强大，实际上虚弱的事物。
To describe something that is huge and bulky. It also refers to something that is outwardly strong but actually weak.
Origin Story
很久以前，贵州山区里还没有驴。一天，一个商人运来一头驴，把它放在山脚下吃草。一头老虎发现了这头庞然大物，它觉得这肯定是什么神仙，于是躲在树林里偷偷观察。它慢慢靠近驴，驴大声嘶叫，老虎吓了一跳。老虎仔细一看，发现驴只会用蹄子踢，没有别的本事。老虎兴奋地跳上去，痛痛快快地饱餐了一顿。
A long time ago, there were no donkeys in the mountainous region of Guizhou. One day, a merchant transported a donkey and let it graze at the foot of a mountain. A tiger discovered this enormous creature and thought it must be some kind of god, so it hid in the forest and secretly observed it. It slowly approached the donkey, which screamed loudly, and the tiger was startled. The tiger took a closer look and found that the donkey could only kick with its hooves and had no other abilities. Excited, the tiger jumped on it and devoured it with relish.
Usage
常用来形容体积巨大、笨重的东西，也比喻表面强大，实际上虚弱的事物。
Often used to describe something that is huge and bulky, but also to describe something that is outwardly strong but actually weak.
Examples
-
这艘巨轮，虽然庞然大物，但也难逃沉没的命运。
zhè sōu jù lún, suīrán páng rán dà wù, dàn yě nán táo chén mò de mìng yùn
This huge ship, although a huge thing, can't escape the fate of sinking.
-
他虽然职位很高，但实际上只是个庞然大物，空有其表。
tā suīrán zhíwèi hěn gāo, dàn shíjì shang zhǐshì gè páng rán dà wù, kōng yǒu qí biǎo
Although he holds a high position, he is actually just a big and incompetent man, only making an impression on the outside.