When George Kelly's play was written, in the Twenties, and when this movie was made, it was natural to call it, and Aubrey Piper (Spencer Tracy) a show-off. Today, with a lot more psychological knowledge and frankness about, that wouldn't do--the story would have to be titled The Immature Man, The Cruel Man, The Selfish Man, or The Liar.
Piper continually lies to make himself look bigger in other people's eyes but really succeeds only in making himself feel better. They nearly always disbelieve and ridicule him. (The exception being his fiancee, then wife, Madge Evans, who romanticises him and finds out her mistake only after marriage.) True, the wife eventually tells him that he is not a man, and his mother-in-law, Clara Blandick, the sourball to end all sourballs, is always sending hilariously scornful put-downs his way. But on the whole the movie regards Piper with tolerant affection.
But if we look at Piper seriously, what is he? A man who causes his wife worry and distress so that he can sustain the fiction of wealth and generosity. A man to whom other people are no more than an audience. One might affectionately tolerate a six-year-old who carried on as Aubrey does, but the way this man ignores reality and people's feelings make him more of a psychopath than a show-off.
What is ironic is that Kelly in fact had got hold of one of the big changes in American life but came at it from the wrong angle. The Twenties was when promotion began to be a powerful force, when fast talk and ballyhoo triumphed over sober reality, and advertisers learned to sell not the steak but the sizzle. But this idea is conveyed far better by characters such as Lee Tracy and James Cagney, who gleefully carried off stunning feats of well-plotted chicanery. Aubrey Piper, on the other hand, with his inept schoolboy antics, grinning and patting himself on the back, is just a loudmouth amateur.
One reviewer has mentioned that this characterisation is a big change from Spencer Tracy's usual solemnity. If you want to see a manic Tracy whom you can regard with affection, look for The Actress, Ruth Gordon's story of her early years. He plays her manic and utterly lovable papa.