After high school he attended computer programming at a trade school. There was a girl in his computer class who had gone to high school with us named Cheryl. I never knew her very well, but every boy in the school knew who she was. She was very pretty, she was a songleader, she was real smart, and she could pop the buttons off of Dolly Parton's shirts. I think most of the boys were aware of that last qualification more than the others.

Cheryl became good friends with Charlie in a purely friendly way. They both had romantic entanglements; Charlie was blinded by the Bitch-Who-Needed-To-Die and Cheryl had a guy. So they would have lunch together and talk about stuff.

One day she came up to his table and startled him just as he was spooning in a bite of soup. He dribbled soup down his chin and she said without hesitation and with absolute deadpan, "Crackers first, Charlie". He sprayed the rest of the spoonful across the table.

I told you it was a silly little story. But this is how those "in-expressions" get started. So if you do something that appears to be obviously or hiliarously out of order in the presence of Cheryl, or BFD, you may get the same counsel, "Crackers First".