He's mute, not a peep does he utter
He plays cute, doesn't cheep, grunt or stutter.
But Harpo makes noise
Going "parp!" at the boys
Horns he'll toot, honk and beep like a nutter.
Arthur "Harpo" Marx (born Adolph Marx; November 23, 1888 – September 28, 1964). David tells us that "Parp!"s a UK comic-strip sound effect word signifying the honk of a horn, care of the magazines Beano and Dandy.