ill-bred \ˈ ̷ ̷| ̷ ̷\adjective 1.: showing (as by rudeness, boorishness) the results of poor upbringing : lacking good manners : impolite, uncivil, rude, loutish < ill-bred remarks > < ill-bred behavior > 2.: inferior (as in physical characteristics) by reason of being the offspring of mismatched parents < an ill-bred animal >