Number 3 in a series

of things-I-have-really-and-truly-found-myself-saying-presumably-in-a-subconscious-attempt-to-expose-the-girls-to-a-full-range-of-modern-idiomatic-English.

As the girls and I are having breakfast:

"Oh my goodness I've forgotten to make Mummy's coffee! She'll have my guts for garters!"