Your mother!

Your mother!

slang A general insult used especially in response to a criticism or offense from someone else. A: "You really ought to lay off those donuts, don't you think?" B: "Your mother!" Boom, slam dunk, baby! Your mother!
Farlex Dictionary of Idioms.
See also:
  • mamma
  • I don't mind if I do
  • (I) don't care if I do
  • (I) don't mind if I do
  • don't care if I do
  • don't mind if I do
  • dollars to doughnuts
  • fire insults at (one)
  • snap
  • Snap!