"Munted is a much used expression over in the UK"

Not in my part of the UK - I've never heard it or seen it written before. I've just googled it, and most of the definitions seem to mean "drunk", although Barb'ry's usage is mentioned. I had thought it might be a regional dialect word, but it seems to be of fairly recent coinage, and while it may be widespread among a section of the community (presumably younger and/or cooler than me, which admittedly embraces a fairly high proportion of the population!) I would say it is by no means commonplace or widely understood.