Although, Mae was know for her acting and her wise-cracks she was also an amazing singer. This is the song, "Where Has My Easy Rider Gone" from the 1933 film He Done Her Wrong. It is unclear what 'easy rider' actually means but UrbanDictionary.com, claims its:
"a colloquial term meaning a man who marries a prostitute and lives off her earnings."
which, when you watch the movie, makes alot of sense.