Saying duh-duh-duh

"He began to whistle between his teeth, a broken dance rhythm, unmusical ... The whistle reached crescendo, clapped off by his hands on his knees, ejaculating duh-duh-duh. Then he just squalled, meaningless, vertiginous ... They whistled, clapping their heels on the floor to furious crescendo, saying duh-duh-duh ..."

-William Faulkner, Sanctuary