Scrumban, Xanpan (XP-ban) - even Prince-ban and DSDM-ban - have all been used as portmanteau words to explain the journeys from a particular named process or framework to a continually evolving and improving process, guided by the principles and practices of Kanban. If you are trying to apply a named process but frustrated by a patchy track-record of improvement, consider the alternative: x-Ban it!
When I was asked in early 2013 if I would work with Clearvision's product development team, they had just adopted Scrum (a matter of weeks before). Their process, like most I've reviewed from teams claiming to use Scrum, was not compliant with a large number of Scrum rules. It was pragmatic, constrained, variably applied and ripe for improvement... but it certainly wasn't Scrum. We had two choices - apply Scrum rules as soon as possible (defining the backlog of necessary changes and a timetable to apply them), or “x-Ban” it (use Kanban to attain evolutionary changes that we kept only if we were confident they resulted in improvements). We did the latter.
There are many lessons I've learned from this experience: some things that worked - and some that didn’t. They're lessons and general principles that others can apply on a similar journey. It has taken much longer to adopt some practices than I expected, the current process is quite different than I expected when I started 18 months ago (it’s more Scrum-like now than when I arrived for example!), but it is a route I would recommend to others.
Start x-Banning your process now!