derring-doery

Noun

 * 1)  Derring-do.
 * 2) * 1953, Isaac Asimov, Second Foundation, Gnome Press, part II: “Search By the Foundation”, chapter 11: “Stowaway”,
 * He left Terminus in a sullen distemper. No one was at the port to see him off. […] He, Homir Munn, was risking his neck in derring-doery of the most outrageous sort, and yet he left alone.