Now that's embarrassing, because up until now, every time I've said, "I know it like the back of my hand," I've really been saying, "I'm totally familiar with that, I just don't know
Esto es vergonzoso, porque hasta ahora, la expresión "lo conozco como la palma de la mano", indicaba "estoy totalmente familiarizado con eso", pero ni siquiera sé