a combination of sarcastic and attitude, that annoying attitude that a lot of girls have, unnecessary sarcasm, so sarcastic that you dont know when they are being serious or sarcastic.
boy: can i have a kiss
girl: yes boy: are you serious?
girl: yes
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!