mansard Posted in M Best definition mansard a disagreeable, conniving, malodorous, spurious and/or illegitimate person. cf bastard. Eric Romer is perhaps the most magnificent mansard in the greater Miami Valley region. — W.B. Yeats How satisfied are you with the definition? Looking for mansard meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 41 times.