Despite her beauty and her youth she "BID 2 SPADES" (The synonym for gaseous indigestion) -- far from a bridge game, there in the tea-room--and how uncomfortable she was!Like myself you may be wondering what exactly this poor woman was DOING. What were the "murmurs" that escaped her "swanlike throat" due to that accursed "nut sundae?" Was she just belching, or does "bidding two spades" actually mean letting rip a swanlike fart?
Concerning a damsel in distress, it is difficult to write. She was young, she was witty, she was impeccably gowned, but in spite of her youth, in spite of her grace, in spite of her wit, she was very much embarrassed.
So mundane a thing as her food was causing her discomfort. The nut sundae at the tearoom had been a little bit too much--and her luncheon was heavy on her heart.
The ordinary measure of relief--some soda and some water, helped her discomfort for the moment, but increased her embarrassment. For hiccups and murmurs escaped her swanlike throat. She was, as the saying goes, "bidding two spades."
We can't look it up online because it appears that Bristol-Meyers Co. (makers of "Gastrogen tablets") simply made the phrase up. This had some precedent, as another company (whose name I forget) had been warning people against "The Ha-Ha's" -- AKA "dry skin" -- for most of 1927.
Why would this sort of "made up phrase" advert have appealed to the people of the 1920s? Well, it certainly was a time of bizarre "fad" phrases to begin with ("The bee's knees," "23-skidoo," "hotcha!") so I guess the advertisers decided to get in on the action. I'm not surprised that "bidding two spades" didn't make it into the dictionary. It's too refined and weird.