The rare cross between what is know as an 'emo' (also known as emo kids, scene kids, grungers, etc.) and a hippie. Signs of hipmos include long, flowing hair, black clothes, vegetarian, tree-hugging kids who listen to bands such as My Chemical Romance, Fall Out Boy, Panic! At the Disco, etc.
Typical hipmo: "Dude, MCR says trees are cool, so trees are cool" - A. Gorham