Bread and butter

I queried on your homepage re "bread and butter" but found some strange answers.

The phrase "bread and butter" I remember since childhood was exchanged as two or more people passed one another, as along a hallway. I've heard it used this way occasionally by people of a certain age all over the country. ???

[It may have been used as you say, but in the US from the 1940s on "bread and butter" was the quip when two people walking side by side split momentarily to pass either side of anything in their path. Origin unknown. - Baceseras.]