Piou: An onomatopoeia used to imitate a foghorn or laser sound, which are commonly found in Jamaican dancehall music. Used to display excitement or affection. Always recited in sequences of, though not limited to, 3.
I've been drinking Irish coffee's in my office all day. Who's down for "Happy Hour"? Pioouu!! piou! Piou! Piiooouuuu!!!!