Calling people “knuckle draggers” is the correct means of response for a grown-up? How quaint it must be in your neighborhood; is avoiding drive-bys considered family time too?
Responding in-kind to crudeness, is not the way MOST grown-ups converse - at least not in my neck of the woods.
When the term “pussy” is thrown around over and over by people referring to an athlete with a concussion, yes knuckle dragger” is adult and appropriate