Relating to a person who is extremely wealthy and has a big house, usually with a negative connotation.
Origin: Comes from the idea that stuck-up rich people look out of their big windows at the poor people milling about on the streets doing poor people things.
Marissa: Oh man! My dad only got me a 72" flat screen tv instead of a 108". What a jerk!
Kyle: Jeez, Marissa. Talk about Big Windows. Get off of your high horse.