SNAKE-IN-THE-ROAD

The diamond-shaped road sign (yellow with black borders) with an arrow at the top and an s-shaped of curve below. Generally seen on mountain roads to warn of curves ahead. Example: My mother or father would point at the sign and say, Hey kids, there's a snake-in-road. I suspect they created this to keep my sister and me from saying, Are we there yet? I'm not sure this fits your rules, but was said rapidly and sounds essentially like one word because there is no real break between any of the words.