The story
From the idea of gingering a horse to make it seem more lively, or adding ginger to spice up a food or beverage; compare ginger group. Perhaps coined by Worthington C. Holman, author of Ginger Talks: The Talks of a Sales Manager to His Men (1905).
First known use, by meaning
- Early to mid 20ᵗʰ century. A speech, particularly one given to salespeople, aimed at inspiring and boosting confidence.
Etymology from Wiktionary, CC BY-SA 4.0.