"Away with you!” (4)
(Other definitions for shoo that I've seen before include "Sound uttered to make animals go away" , "told to go away!" , "Drive away" , "Dismiss" , "Word used to frighten away animals" .)
(Other definitions for scat that I've seen before include "Jazz singing - animal droppings - silvery fish" , "improvisation in jazz" , "Go away quickly" , "Type of jazz singing - be off!" , "way to sing > "Go away!"" .)