English Phrase: Freak of nature
You may hear people call defects freaks of nature.
You have to watch your tongue when using this idiom because it has both negative and positive connotations.
Things like oddly shaped fruits or vegetables and sometimes cruelly, people who are unique in some way will be bullied and called freaks of nature.
A kid with larger than usual ears or long legs could be called a freak of nature by her fellow students, and in this context, it is not nice at all.
As I mentioned, though, freak of nature can also be used positively.
Sometimes athletes with superhuman abilities, extremely intelligent or otherwise talented people are called freaks of nature by their friends or fans.
In this context, it is not meant to be harmful.
Some people are gifted, and this makes them exceptional because they can do what others can’t do, but wish they could.
I think it’s more likely a language student will see the phrase freak of nature used rather than use it themselves.
If you do see it, think about the context of the situation to determine if it is positive or negative.