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'.”
(..) Thank you very much, Facebook. #And I sent a text to my mom. Revolutionary! #You have not seen you for minutes. God! The most important ... #I was told that we have a miniature pig. You're right. This is ... It is a very cute pig. Our lives can continue. #I want one. Nice shot. (..)2014 Boyhood
(..) And work? How's it going? All right. Today was a bad day. He missed a guy. But no doubt it gives another perspective on life. People are pig! When they ask you, say "A Mason is doing very well." "You have a job. Cleans everything." Say hello to Annie and Cooper. Say hello to your big brother. (..)2014 Boyhood