big hair house
n. A house that has a garish style and that is overly large compared to its lot size and to the surrounding houses.
Examples
2005
'We take the approach that this is a house built for you, and let's see if we can make it more efficient," Ms. Cheatham said. As an environmentalist, she said, she tells clients that if they believe in sustainability, they should consider using fewer resources to build their houses.

"If I didn't believe that," she said, "I would be doing 'big hair houses"' — a reference to the overornamented McMansions that have proliferated around Dallas.
—Fred A. Bernstein, “Bucking the Trend In the Land Of the Large,” The New York Times, May 22, 2005
1999
Yet the newest residential rage in Dallas is the antithesis of the traditional neighborhood: the gated community. Depending on your income and level of anxiety, these private enclaves may contain golf courses, health clubs and equestrian centers, surrounded by big hair houses of indecipherable pedigree and protected round the clock by cameras and private police.
—David Dillon, “Where we live: Dallas' neighborhoods,” The Dallas Morning News, May 02, 1999
1995 (earliest)
"There is a big fear of being different and off the market," said Mr. Baum. "Everyone is so worried about getting top dollar at resale that they put aside personal tastes."

The result is what Mr. Baum calls the "North Dallas Big Hair House" — a regional home-building style dominated by bland brick facades, arched doorways and tent-like roofs.
—Steve Brown, “Latest developments in Dallas area, elsewhere, are taking their cues from the past,” The Dallas Morning News, August 13, 1995
Notes
When you ask [Dolly Parton] why she appeals to such a wide audience, you can tell she's given it a lot of thought by the way she unhesitatingly launches into a list of the reasons. Children like her, she believes, because, 'I look like a fairy tale, I look like Cinderella. As a little kid I was always fascinated with people that wore jewelry, long fingernails, big hair, "cause in a little kid's mind that's the way you're supposed to look, that's glamorous, that's a movie star."
—Susan Wood, “Singer, Songwriter, Superstar, and still the nicest person in show business,” The Washington Post, August 13, 1978