stealth masterbating
When one wacks off as quietly as possible so as to not disturb the people in the same room.
Sam: I hope no one notices I am stealth masterbating
Girl friend: Sam ... are you wacking off!!!!
Sam: Oh Shit!
Girl friend: Sam ... are you wacking off!!!!
Sam: Oh Shit!
stealth mode masterbation
The act of whackin it very quietly, like when everyone is home or someone is right outside the room. Turn the volume down really low.
Yo man the other night I was so horny so I did some stealth mode masterbation.