That's a part of Oracle and Neo dialogue from Matrix:
Oracle: So, what do you think? You think you're the one?
Neo: I don't know.
Oracle: You know what that means? It’s Latin. Means “Know thyself”. I’m going to let you in on a little secret. Being The One is just like being in love. No one can tell you you’re in love, you just know it. Through and through. Balls to bones. Well, I better have a look at you. Open your mouth, say Ahhh.
Question: what are the other ways to say the phrase "balls to bones"? Maybe more common or polite ones but widely used still?