HBOM

Acronym for "Hanging Bag of Meal"

For talking about someone pretending to be a HBOM, like the cat in Aesop's fable "The Cat and the Mice":
- ... "you're very clever, madam, no doubt: but you may turn yourself into a bag of meal hanging there, if you like, yet you won't catch us coming anywhere near you."

You think you can (pretend to be a) HBOM and I will fall for that again?