HIH stands for His Imperial Highness

a quaint reaction to when something quite astonishing happens or someone says somethign out of the ordinary.

Hand-in-Hair disease. Often used in forums talking about black hair. It is an acronym that refers to the tendency to pull at, play with or otherwise manipulate the hair with your hands resulting in hair breakage.

..... hypocrites in hiding, we all know them, They are the ones who urinate on your leg and tell you it is a busted water pipe in your abode and you believe it because you live in deplorable conditions. Be careful of the beguiling tongue of the HIH.