The Collaborative International Dictionary
lopsided victory \lop"sid`ed victory\, n. A victory in a contest in which one side defeats the other overwhelmingly; -- in sports, meaning one side scores much more than the other; in war, meaning one side has many more casualties than the other.
Usage examples of "lopsided victory".
The issue had never really been in doubt, but to have won such a lopsided victory was all the more gratifying.
He had set the rear-wall projectors to run a reconstruction of the previous week's battle, in which his units had wiped out the Seatiger ambush and set up the Herd's lopsided victory over the Seatiger main body.