In baseball, mostly referred as a pitch which "breaks." Those pitches being a curveball, slider, or cutter which all break. Breaking ball is mostly or widely used for a curveball.
Person 1: I'll give you my watch if you don't ever tell anyone about this.
Person 2: I wantthe pants too.
Person 1: Oh, you're really breaking my balls here.
1.They keptbreaking my balls about the girl i took out last night.
2.My boss is always breaking my balls with all this work.
3.She kept insisting i knew what she was talking about i told her your breaking my balls with this story.
