This phrase refers to a British game played by gentlemen for bants, involving two or more participants. Each participant must make a fine brew of what is only acceptable to which is tea. A McVitie's Digestive is then selected to dunk into one's own tea no further than half way, for those who can dunk the longest and pull out the Digestive in tact and consume it is classed as the winner. One pot of tea per round until either tea is all consumed or packet of Digestives. Tea must be hot to qualify a challenge equal to the oppenents for parity.
Basil: I say old chap, Is it five o clock yet?
Granville: Indeed it is! I'll put the kettle on. Did you bring the Digestives?
Basil: Well it wouldn't be Digestive Roulette if I didn't!
Granville: Don't tell Barbara she'll have my guts for garters!
Granville: Indeed it is! I'll put the kettle on. Did you bring the Digestives?
Basil: Well it wouldn't be Digestive Roulette if I didn't!
Granville: Don't tell Barbara she'll have my guts for garters!
by Singh_Bains_Jatt August 2, 2017