YMHMMFSWGAS

You must have mistaken me for someone who gives a shit

and YMHMMFSWGAS
sent. & comp. abb. What makes you think I care about what you are saying? (Usually objectionable.) So you’re unhappy. Why tell me. You must have mistaken me for someone who gives a shit
See also: give, have, mistaken, must, shit, someone, who

YMHMMFSWGAS

verb
See You must have mistaken me for someone who gives a shit
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • IIABFITII
  • LABTYD
  • miss one's guess, to
  • egg in your beer, what do you want?
  • CUIAL
  • See you, too
  • Ciao, for now
  • If it ain’t broke don’t fix it
  • big fat grin