Also known as an ass trumpet or a butt screech. An extremely high pitched explosion from nether-regions of ass canyons. This is generally limited to females, but has been known to grace the sphincter of homo's as well.
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!