scat

I remember I heard something fiddling around in the galley, and I hollered 'Scat!'

The poor man, in an access both of alarm and courage, whirled the bar about his head and shouted "Scat!"

Scat′hold, open ground for pasture; Scat′land, land which paid duty for rights of pasture and peat.

In fact, it would have spoiled everything, and Angel encouraged the animal's exit with a suppressed "Scat!"

And every man went his way, and the corps are the "Scat-ups" to this day.