What is the slang meaning of 'biscuit' in this context?

I notice when she makes a cuss word reference she will do the one way of getting around it, by substituting with a similar sounding word as to avoid using the actual word. Two I noticed are:

Don't give a fudge = the "F" word is dropped with a second not offensive "F" word.

Don't take shnitzal from anyone = the "S" word is replaced.

So anyway, I'm guessing "Biscuit" is along the same lines. Perhaps replacing the "B" word for female dog.

A "biscuit" is an American cookie. In the context of your sentence, I'm assuming Meadows considers rumor mongers and gossips slow witted and/or dull. Similar to the American usage of "dork" for example.

I didn't notice it before, but now I see that all of her euphemisms are food items - fudge, shnitzal, biscuit. Hmm.