Slang slung

While the phrase “balls to the wall” may sound testicular, it’s actually totally aeronautical. See, the throttle levers on some airplanes had these spheres on top and you pushed them forward to go faster. The fastest you could go was when they were all the way to the front, against the dashboard. So saying “balls to the wall” is simply saying “full throttle” or “pedal to the metal,” with a whiff of aviation fuel and testosterone. The point being, make sure you fully understand vernacular phrases before incorporating them into your colloquies lest you find yourself pulling some queer boners.