French Laxative

The name for the often shit-provoking combination of a cup of coffee and a cigarette, both of which are stimulants and thus help to get the bowels rolling. Named for the popular French pastime of lounging in a café with a roll-up. And, of course, laxatives.

"I had a cig and a cup of coffee and then I really needed a shit."
"Aha! The old French Laxative!"