"My dice bag!"
Two of my friend's and I attended a little ENWorld based gaming convention I helped organize 18 or so years ago. On the drive back, my friend driving the car stopped suddenly, and my dice bag slipped from the seat to the floor. I jokingly cried out, in an exaggerated nerdy voice, "My dice bag!"
My friends did not believe this was not a natural reaction, and for years I tried fruitlessly to defend myself (while also laughing and being in on the joke). The phrase then spread to my players' other gaming tables, and when I'd hang out with people I didn't even play with, I'd hear someone shout out, "My dice bag!"