endo n. 1. a bicycling accident in which the rider is thrown forward over the handlebars. 2. an intentional bicycle stunt which lifts the bike’s rear tire off the ground. Etymological Note: Perhaps from end-over-end. (source: Double-Tongued Dictionary)
Further reading
Enthusiastic book recommendations! Martha’s savoring the biography of Alexander von Humboldt, the 19th-century explorer, polymath, and naturalist who revolutionized our understanding of nature and predicted the effects of human activity on...
A documentary film called My Beautiful Stutter follows youngsters at a summer camp specifically for stutterers. It’s a place for finding acceptance, support, and confidence for navigating the larger world. And:, “The High Priestess of...
This word also refers to a trick performed on a bicycle or motorcycle in which the rider balances on the front wheel, with the rear wheel in the air.
You’re right. I’m working on the second sense for this word; I think the first cite above is unclear, and probably belongs to your definition of an endo, and not to the one I have here.