(vulgar)An expression of anger or disrespect toward another party's statement.
1998, Wally Lamb, I Know This Much Is True, Cambridge University Press (1998), ISBN 0-06-039162-6, page 291:
Then the one with the bangs handed the phone to the other one, who said something snotty to Leo. He told her she could blow it out her ass.
2002 — Douglas Coupland, All Families Are Psychotic, Vintage Canada (2002), ISBN 0679311831, page 62:
'You little monsters! Who the **** do you think you are? I'm calling the police right now. You're all going to get a thorough licking on this one. Jail, too.'
'Blow it out your ass,' said Wade. Mrs. Breznek snorted in disgust.