It would be most ungentlemanly to press the subject any further.
This was not only an ungentlemanly, but also an ungodly act on Jupiters part.
Ungentlemanly conduct in the House stinks in their nostrils.
You are unwarrantably accusing me of a most ungentlemanly proceeding.
You are right when you describe such conduct as ungentlemanly.
How could he have been so harsh ...