Wiktionary
a. Not gentlemanlike.
WordNet
adj. not befitting a gentleman [syn: ungentlemanly]
Usage examples of "ungentlemanlike".
Secretary had just cause to be offended at such an ungentlemanlike attack, although he showed his good sense in treating it with the contempt it deserved.
It requires perfect self-possession, great tact, and some nerve, for an American, who is brought much in contact with the English on the continent of Europe, to avoid a querulous and ungentlemanlike disposition to raise objections on these points, and at the same time to maintain the position, and command the respect, with which he should never consent to dispense.
He had also, to tell the truth, swallowed a good bit of the mess-room poker, which made it as impossible for Major Hoskyns to descend to an ungentlemanlike word or action as to brush his own trousers below the knee.