As of today, I'll be dedicating select blog posts to examining the meaning of words most people are unfamiliar with and tying them, of course, to the world of psychology and human behavior.  This week, let's explore the meaning of the word curmudgeon .  According to Dictionary.com, a curmudgeon is a bad-tempered, difficult, cantankerous person .  It brings to mind irritable characters like Grumpy from Snow White and the Seven Dwarfs, Scrooge from Charles' Dickins' "A Christmas Carol," and maybe even Donald Trump. We've all had to contend with so-called curmudgeons at work; in most cases, it's our own boss. We can also point to at least one person in our family known for being a major crank, whether it's a meddling grandparent or nosy aunt. It's safe to say we all have days in which we become curmudgeons . A couple of months ago, on the way to work, I noticed I had a flat tire. Having to take the car to the shop in the pour...