Some find it difficult to form an "r" sound, and some are able to, but just don't. I'm looking for a word which means "not pronouncing r's", without implying inability to pronounce them, though that may be the case.
Specifically, I'd like a word which mean "not pronouncing any r's", but if there's a word which means "not pronouncing some r's" (as in many dialects), that would be interesting to know too.

