Something very current, or modern where there may actually be a hazard or risk in using it, such as with potentially unstable software. The term relates to a sword
1. If you are at the bleeding edge of a particular field of activity, you are involved in its most advanced or most exciting developments. McNally has spent 17 years at the bleeding edge of computing
Bleeding-edge equipment or technology is the most advanced that there is in a particular field. an RAF facility with bleeding-edge electronics and communications systems