Wiktionary
unsportsmanly
a. Not sportsmanly; not befitting a sportsman.
Usage examples of "unsportsmanly".
They fell back, he elbowed one, kicked the other unsportsmanly, rammed the princess through a little clump of staring men and women behind.
They arrive here, and breed early in the spring--sometimes, indeed, before the snow is off the hills--get their young off in June, and with their young are most unmercifully, most unsportsmanly, thinned off, when they can hardly fly--such is the error, as I think it, of the law--but I could not convince my stanch friends, Philo, and J.