Can be used to show astonishment (like: Oh my gosh! That is so LMNOP! or LMNOP! that's awesome!) Can be used interchangeably with the phrase "Why don't you suck my dick!"(like: You know what, you can LMNOP!") Can be used to show that some one is tripping or acting unreasonably (like: Calm down! Gosh, you are so LMNOPing!).
Why don't you LMNOP? Gosh, you're so LMNOPing. OMG!!!LMNOP!!!