any word that is composed of the alternate letters represented by the keys used to select the desired letters on a keypad of a mobile phone or similar device.
you type "pint" you get "shot" or "riot": in this case, pint and shot are keynonyms of riot.
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!