larrup \LAR-uhp, verb:

To beat or thrash.

When a seagoing canoe beached on the stones, or when a neighbor came larruping from around back of the house, Martha Obenchain, peeling potatoes at a table in the sun, rose and put the kettle on, tickled pink.
— Annie Dillard,The Living

A fast white boat comes larruping around the point from the direction of Mercer Island and banks towards him.
— Neal Stephenson,Cryptonomicon

Larrup may derive from the Dutch word larpen meaning “to beat with flails”.