At MemeGenerator, check out the McMansion gables image:
McMansions are often known for their multiple gables. These add more volume and angles to the roofline. They are typically not necessary so are considered gauche for simply trying to impress.
This is based on the Xzibit Yo Dawg meme which is described thusly:
Yo Dawg, or Sup Dawg, is an image macro series based on portrait shots of American hip hop artist Alvin Nathaniel Joiner, better known by his stage name Xzibit, and humorous captions that are composed around the recursive phrasal template “Yo Dawg, I herd you like (noun X), so I put an (noun X) in your (noun Y) so you can (verb Z) while you (verb Z).” Since rising to popularity in early 2007, the series has been considered one of the most well-known and longest lasting examples of recursive humor on the Internet…
While Xzibit initially began his career in the entertainment industry as a rapper from Los Angeles, his mainstream breakthrough came almost a decade later as the host of the MTV show Pimp My Ride, which ran for six seasons from 2004 to 2007. In the show, Xzibit gained a reputation for adding luxurious amenities and equipments like fish tanks, clothes dryers and fireplaces into the participant’s car, presumably without consent.
So if Xzibit is known for a show featuring consumption, the connection to McMansions makes some sense.