Wiktionary
a. Not statesmanlike.
WordNet
adj. not statesmanlike; "unstatesmanlike procedure" [ant: statesmanlike]
Usage examples of "unstatesmanlike".
Few intelligent persons, and none having the statesman habit of mind, befriended the reckless, violent, eminently unstatesmanlike President.
When we contemplate these achievements of mind, by which manual labor has been diminished, and every physical force both magnified and economized, how unstatesmanlike is the view which regards a human being as a bundle of muscles and bones merely, with no destiny but ignorance, servitude, and poverty!
So soon as a nation has, in a very unstatesmanlike spirit, pulled down all recognized social superiorities, she opens the sluice through which rushes a torrent of secondary ambitions, the meanest of which resolves to lead.