To be perfectly honest I find the contextual use of Proper Chels and/or Minerals to be utterly, utterly cringe. Particularly from the set of fans that continue to use it.
It's actually aimed towards a certain fanbase that believe they are holier than thou whilst having some truly awful football takes. Supporting the club since the 70s or being a season ticket/match going fan doesn't excuse asinine reasoning. These same blokes are wanting a midfield three of Gallagher, Rice, and Mount because they are all proper Chels or wanting a Mourinho 3.0 return.