为所欲为 do whatever one wants
Explanation
指做自己想做的事，不受任何约束，没有顾忌。带有贬义色彩，表示任意妄为，不顾后果的行为。
To do what one wants to do, without any constraints or scruples. It has a negative connotation, indicating arbitrary and reckless behavior.
Origin Story
从前，在一个繁华的城市里，住着一位富商，他名叫王百万。王百万家财万贯，但他却是一个极度自私、为所欲为的人。他仗着自己有钱有势，横行霸道，欺压百姓。他经常强占农民的土地，逼迫他们给他干活，还经常借着各种名义，敲诈勒索那些无依无靠的穷苦人。王百万为所欲为，他的行为引起了很多人的不满，但是，没有人敢站出来反对。因为，谁都知道，王百万是城里最有钱最有势的人，谁惹了他，谁就只有倒霉的份。终于，王百万的恶行终于触犯了天怒人怨，他被官府查办，家产被没收，自己也被处以极刑。
Once upon a time, in a bustling city, there lived a wealthy merchant named Wang Million. Wang Million was extremely wealthy, but he was a selfish and unscrupulous man. He flaunted his money and power, bullying and oppressing the people. He often seized land from farmers, forcing them to work for him, and under various pretexts, he extorted money from poor people who had no one to rely on. Wang Million did whatever he wanted, and his actions caused a lot of discontent among the people, but no one dared to speak out against him. After all, everyone knew that Wang Million was the richest and most powerful person in the city, and anyone who dared to anger him would face consequences. In the end, Wang Million's evil deeds finally provoked the wrath of the heavens and the resentment of the people, and he was investigated by the government, his property was confiscated, and he himself was executed.
Usage
这个成语通常用来批评那些不顾后果、肆意妄为的人。例如，我们可以说“他为所欲为，最终害了自己”。
This idiom is often used to criticize those who act recklessly and without regard for the consequences. For example, we could say “He does whatever he wants, and ultimately hurts himself.”
Examples
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他为所欲为，根本不顾及别人的感受。
ta wei suo yu wei, gen ben bu gu ji bie ren de gan shou.
He does whatever he wants, regardless of how others feel.
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他们仗着权势，为所欲为，无法无天。
ta men zhang zhuo quan shi, wei suo yu wei, wu fa wu tian
They act with impunity, abusing their power without regard for laws or morals.