When someone steals just enough of your property, that they don't believe you will miss what was taken.
I had twelvecans of beer in this cooler and now two are missing. I can't believe that some motherfucker would one-ball me.
By Henrieta
One Ball Boner
An erection on a male who has only one testicle. Typically displayed in online chats or ASCII form as a U plus a seemingly appropriate number of pipes (|) followed by a D to indicate the head. The head may be preceded by two or more slashes (\) if a pulled back foreskin is present.
Person 1: I slept with your girlfriend last night.
Person 2: Are you serious?! I'm going to kill you!!
Person 1: I'm just busting your balls! I would never sleep with your girlfriend.
By Danette
One Ball Wonder
A douche who only has one ball. This insult is usually shouted out in his general direction whenever he's around or whenever someone is talking about him behind his back.