in breakdancing, one who uses only power moves such as the windmill or halos (often known as when the breaker swings his legs round and round and makes a V shape with them...
The kid down the block doesn't know what real breaking is...He's such a powerhead...always trying to impress people
A person who enjoys and seeks out fresh, untracked snow for skiing or snowboarding. This person would usually live close to a ski area that receives a large amounts of snowfall.
Many hardcore powderheads live at places like Alta, Snowbird, Jackson Hole, Whitewater, Mt Baker.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!