'Walk-over' definitions:

Definition of 'Walk-over'

From: GCIDE

Walk-over \Walk"-o`ver\, n. In racing, the going over a course by a horse which has no competitor for the prize. [1913 Webster]
2. Hence: (colloquially) A one-sided contest; an uncontested, or an easy, victory.
Syn: walk; cake-walk. [1913 Webster +PJC]