A flirtatious gesture, generally used as a silent way to ask the second party if they "wanna fuck?" Not to be confused with the same gesture meaning "fuck you!"
All it took to get lucky, was "blowing smoke in someones face". And her smile was the only answer he needed.
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!