A person who is cheesy
, a snob, and one who thinks:
1. "They're all that!" and really aren't, or
2. Believes they know more than everyone else, but really don't, and/or
3. Thinks they are better than everyone else.
In usage, such a person is described as sitting on their gold plated toilet seat, or asked to "get off their gold plated toilet seat."
See also: high horse
, putting on the dog
Did you notice Angela at today's staff meeting? She was sitting on her gold plated toilet seat, trying to tell everyone what to do! Everyone knows she ain't all that!