When someone is in a call with someone (I.e. Skype or Teamspeak) and then they start wanking off and talking to them at the same time, without making any noise.
A: Did you know that most of the times we talk I'm sneak wanking?
B: Tmi , didn't need to know that bro.
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!