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.
B: Tmi , didn't need to know that bro.
by Joel6909 February 5, 2017