Hiplo simply means the essence of Heatherawesomeness. Briefly, it is characterized by aviator glasses (worn both inside and outside), bomber jackets, $9 knock-off vans, unconditioned hair, long jeans regardless of weather, a walk that is a cross between a farmer and a gangster, and a knowledge of all things nerdy. Some people have it, others wish they did.
Have you seen Sammie? She's been pretty hiplo since she met Heather.