https://en.wiktionary.org/wiki/mush

and what else?...well, wiki has so much more...upon the slang word 'mush'....go figure:

https://en.wikipedia.org/wiki/Angloromani_language

oh, I know...what I was supposed to dig up, here...agent K had wanted to use 'angloromani' whilst programming at Holmfirth station etc etc....ha ha ha....see previous notes....go figure:

 

 

and so I would guess...that in an alternate universe, let us say...the new 'panther' service might also have something to do with it...seeing as it is now coming up as part of the whole clump.