倾巢出动 all out
Explanation
指全部出动，多用于军事或比喻性的场合。
It refers to the mobilization of all forces, mostly used in military or metaphorical contexts.
Origin Story
话说很久以前，在一个古老的森林里，住着一群勤劳勇敢的蜜蜂。它们建造了一个巨大的蜂巢，里面储存着满满的蜂蜜。有一天，一只贪婪的熊发现了这个蜂巢，它口水直流，想要霸占所有的蜂蜜。熊悄悄地靠近蜂巢，准备偷袭。可是，它刚碰到蜂巢的外围，就招惹来了蜜蜂们的强烈反击。蜜蜂们倾巢而出，像一团黑云一样，飞向熊，用它们锋利的刺针攻击熊。熊猝不及防，被密密麻麻的蜜蜂蛰得痛不欲生，只能狼狈逃窜。从此以后，再也没有哪个动物敢轻易招惹这个森林里的蜜蜂们了。
Long ago, in an ancient forest, lived a group of hardworking and brave bees. They built a huge hive, filled with honey. One day, a greedy bear discovered this hive and wanted to take all the honey for himself. The bear quietly approached the hive, preparing to ambush it. However, as soon as it touched the outer edge of the hive, it provoked a strong counterattack from the bees. The bees poured out of the hive, like a dark cloud, flying towards the bear and attacking it with their sharp stingers. The bear was unprepared and was stung so badly by countless bees that it could only flee in disgrace. From that day on, no animal dared to provoke the bees in this forest again.
Usage
通常用于形容敌人或某个群体全力出击，也可用作比喻。
It is usually used to describe an enemy or a group of people attacking with full force; it can also be used metaphorically.
Examples
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面对强敌，他们决定倾巢而出，决一死战。
miàn duì qiáng dí, tāmen juédìng qīng cháo ér chū, jué yī sǐ zhàn
Faced with a strong enemy, they decided to put all their strength into a decisive battle.
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公司倾巢出动，参加了这次重要的产品发布会。
gōngsī qīng cháo chū dòng, cānjiā le zhè cì zhòngyào de chǎnpǐn fābù huì
The whole company came out for the important product launch.