Lady Muck noun a woman who is, in the speaker’s opinion, unjustifiably self-important or esteemed UK,1957 The counterpart to LORDMUCK.
At this point, Lady Muck returned from her psychology course. Christine called her a right snotty cow. Lady Muck called Christine a lazy bitch and slammed the door on her flying pinny strings. — The Guardian, 22 August 2003