I never mentioned another good idea but some people do name their SD/HD firearm. an example is a shotgun (AKA: Arnold)
my wife, my two children, and I are coming back to the RV in the parking lot as dusk is ending and I have two bags of groceries on my arms and two males are standing near my RV waiting for us to get there. long story short for the thread:
I ask my wife to "go check on Arnold". that's code for an easy, non-suspicious way to say "go grab the shotgun" in case this situation escalates. That takes her out of the line of danger too, and she can bring the kids inside before whatever plan is being hatched by these guys begin. Of course it might be an innocent situation, but you never know especially if you're not where you usually reside.
"Damn the torpedoes, full speed ahead!" -Admiral Farragut @ Battle of Mobile Bay 05AUG1864