I'm back to inviting readers to submit quotations whose origins they want me to try to trace, using my book, The Yale Book of Quotations, and my more recent researches.
merry staser asked:
"'Wham, bam … thank you ma’m'" We have been looking for this one all over and can’t seem to find out where it came from … (travelling in a carriage … was one we found … but not a full explanation). Thanks."
I don't have a full explanation (and I'm not sure one is necessary, the meaning of the expression is obvious). The earliest occurrence I know of is in the 1948 play Mister Roberts, where a sailor character says "Well there goes the liberty. That was sure a wham-bam-thank-you ma'am!"