A clueless touristy beginner to snowsports, usually dressed in bright 80's clothes and is possibly from texas. Gaper is a reference to the gap between the beanie and the goggles on their forehead. Prone to getting "clacked" or ran into from making giant slow wide turns that take up the entire mountain, and being on runs that are far above their skill level.
Also a good term to describe the gangstered out, baggy clothes wearing, shit talker standing on the top of the terrain park complaining about everyone being "gapers" who, when they actually go, cant even make it halfway up the half pipe, don't even make it over the jump, or something equally unimpressive.
That gangstered out shit talker at the top of the half pipe was really just a gaper in disguise.