"God bless you" equivalent for fart?

In response to someone sneezing there are a few possible phrases you can say as a form of polite acknowledgement:

"God bless you"

"Gesundheit"

And others.

But with a fart you laugh, deride or come up with something clever to say on the spot.

Is there a commonly known polite word or phrase that says "I acknowledge your flatulence" similar to things said after sneezing?

My preferred retort is 'everyone's a critic!'

Supposedly, Princess Diana said...

Oh, no, it's not dogs I don't like -- it's corgis. They get the blame for all the farts.

So I imagine that in Buckingham Palace, if (God forbid! :) the Queen should let one rip, the proper reaction would be to exclaim "You naughty dog, Holly!" (assuming you know the dog's name). I don't think it would be polite to say anything that explicitly blamed the Queen.

I'm not royal, and I don't have a dog. In my house, the proper reaction (from either the guilty party, or considerate others helping him/her save face) is...

Bloody cat!

Cats are more likely than dogs to be curled up in a corner out of sight, so you can blame one even if you can't see it (at a pinch, even in a house that doesn't have cats, though that is stretching it a bit).

"Ah, Bisto!"

Urban Dictionary has an apt definition:

Bisto

A fart. To be used in the expression "Ah, Bisto" inferring relief at the passing of some aromatic wind.

Origin: Bisto adverts. The family sit down to eat and one member of the family (following a deep inhalation through the nose) expresses their delight at the smell provided by the gravy, by exclaiming: "Ah, Bisto".

Q "Did you just let one go?"

A "Ah, Bisto!"

by TommyE February 16, 2004