When someone thinks that you fancy them, yet you ignore it and pretend you like them, yet slag them off behind their back with something extreme yet likley, damaging their street cred and chances of having sex with anyone in the future.
"I'm gunna slapper poach that Ho, I cant believe she caught herpes after sucking off that tramp for a taste of his special brew!'
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!