Wiktionary
n. (context idiomatic English) Something very current or modern, where there may actually be a hazard or risk in using it; ''bleeding-edge software'', for example, is potentially unstable.
Wikipedia
Bleeding Edge is a novel by American author Thomas Pynchon, published by Penguin Press on September 17, 2013.The novel is a detective story, with its major themes being the September 11 attacks in New York City and the transformation of the world by the Internet.
Usage examples of "bleeding edge".
But now there were hundreds of jobs to be done, more than could be accomplished even with a total effort, and so she took the system right out to the bleeding edge as programmers would say, and saw just how much that effort could do, even as she tried to figure out how to do more.
Max had the money and connections to ride the bleeding edge of technology.
The ship's circuitry was at the bleeding edge of its self-repair capacity.