The abnormally large hands of a musician, typically one who plays the piano. Can also pertain to the hands of a musician who plays an instrument requiring a wide physical reach such as guitar or bass. Note: hands must be freakishly huge and may only be called piano hands if the specimen is musically inclined. That's right, we know who you are, impostors. . .
Derek: How is it even possible that you can pick up that watermelon with one hand?
Dave: Piano hands, dude. Piano hands. . .