He is a sexist 'pig'. = He is a 'male chauvinist pig'. [=he is a man who thinks women are not equal to men]
The train station will be renovated 'when pigs fly'. [=it will never be renovated]
“This time I think he'll ask me to marry him!” “Yeah, and 'pigs might fly'.”
(..) to the great Ragnar Lothbrok should turn out to be a cripple and a reject. (LAUGHS) So this is what the grunting of the little pigs was all about. SAXON CAPTAIN: No, not there! SAXON SOLDIER: Where shall I put them? (HORSE WHINNIES) (MEN YELLING INDISTINCTLY) MAN: He's here! (..)2017 TvShow: Vikings Title: On the Eve Season: 4 Episode 19