If you don’t watch Seinfeld then the picture to the left will confuse you.  The Seinfeld "Sidler" on the left is someone who is right at your hip, almost attached.  The guy in the pic is the annoying sidler.  I love my wife because she is a good sidler.  Today when I got my staples pulled out of my head (long story some other time), she gave up an hour of her afternoon off to sit with me and keep me from being bored.  Anyway, she’s my favorite sidler.