self-own       
 noun [ C usually singular ] US informal uk/ˌselfˈəʊn/ us/ˌselfˈoʊn/
 无意中让自己难堪,因为说了蠢话或做了打脸的事情
a statement or an act in which you unintentionally embarrass yourself or harm yourself in some way 
  The attempted smear, one user wrote, was the "best self-own of 2020."  一位用户写道,这次的未遂抹黑事件是“2020年最典型的搬起石头砸自己的脚”。 
 How much does the humiliation of a self-own really matter in the real world of politics?  在现实世界的政治生活里,自我打脸的羞辱是不是什么要紧的事情? 
 - More examples
- This tweet is just a massive self-own.
- Naming the book in this way has become the ultimate self-own.
- You can always guarantee whatever comes out this dude's mouth will be a self-own.
self-own       
verb [ I or T ] US informal uk/ˌselfˈəʊn/ us/ˌselfˈoʊn/
 无意间做了让自己感到尴尬的事(特别是做了些引火烧身的事),不小心黑到自己,自黑
to say or do something that makes you unintentionally embarrass yourself or harm yourself in some way
  She self-owns so often that sane people wonder why she still maintains a public profile. 她屡屡自己黑到自己,以至于理智的人都纳闷她为什么还在公众场合出没。 
 He just totally self-owned himself.  他简直是彻底自黑了。 
 - More examples
- You self-owned there, big time!
- It turns out that if you hold enough power, you can self-own all you want and keep grinning in the face of the jeers.
- One cannot self-own without trying to own someone else.